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<a class="jxr_linenumber" name="1" href="#1">1</a>   <em class="jxr_comment">/*</em>
<a class="jxr_linenumber" name="2" href="#2">2</a>   <em class="jxr_comment"> * Copyright 2012 The Netty Project</em>
<a class="jxr_linenumber" name="3" href="#3">3</a>   <em class="jxr_comment"> *</em>
<a class="jxr_linenumber" name="4" href="#4">4</a>   <em class="jxr_comment"> * The Netty Project licenses this file to you under the Apache License,</em>
<a class="jxr_linenumber" name="5" href="#5">5</a>   <em class="jxr_comment"> * version 2.0 (the "License"); you may not use this file except in compliance</em>
<a class="jxr_linenumber" name="6" href="#6">6</a>   <em class="jxr_comment"> * with the License. You may obtain a copy of the License at:</em>
<a class="jxr_linenumber" name="7" href="#7">7</a>   <em class="jxr_comment"> *</em>
<a class="jxr_linenumber" name="8" href="#8">8</a>   <em class="jxr_comment"> *   <a href="http://www.apache.org/licenses/LICENSE-2.0" target="alexandria_uri">http://www.apache.org/licenses/LICENSE-2.0</a></em>
<a class="jxr_linenumber" name="9" href="#9">9</a>   <em class="jxr_comment"> *</em>
<a class="jxr_linenumber" name="10" href="#10">10</a>  <em class="jxr_comment"> * Unless required by applicable law or agreed to in writing, software</em>
<a class="jxr_linenumber" name="11" href="#11">11</a>  <em class="jxr_comment"> * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT</em>
<a class="jxr_linenumber" name="12" href="#12">12</a>  <em class="jxr_comment"> * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the</em>
<a class="jxr_linenumber" name="13" href="#13">13</a>  <em class="jxr_comment"> * License for the specific language governing permissions and limitations</em>
<a class="jxr_linenumber" name="14" href="#14">14</a>  <em class="jxr_comment"> * under the License.</em>
<a class="jxr_linenumber" name="15" href="#15">15</a>  <em class="jxr_comment"> */</em>
<a class="jxr_linenumber" name="16" href="#16">16</a>  <strong class="jxr_keyword">package</strong> org.jboss.netty.handler.codec.spdy;
<a class="jxr_linenumber" name="17" href="#17">17</a>  
<a class="jxr_linenumber" name="18" href="#18">18</a>  <strong class="jxr_keyword">import</strong> org.jboss.netty.channel.Channel;
<a class="jxr_linenumber" name="19" href="#19">19</a>  <strong class="jxr_keyword">import</strong> org.jboss.netty.channel.ChannelDownstreamHandler;
<a class="jxr_linenumber" name="20" href="#20">20</a>  <strong class="jxr_keyword">import</strong> org.jboss.netty.channel.ChannelEvent;
<a class="jxr_linenumber" name="21" href="#21">21</a>  <strong class="jxr_keyword">import</strong> org.jboss.netty.channel.ChannelFuture;
<a class="jxr_linenumber" name="22" href="#22">22</a>  <strong class="jxr_keyword">import</strong> org.jboss.netty.channel.ChannelFutureListener;
<a class="jxr_linenumber" name="23" href="#23">23</a>  <strong class="jxr_keyword">import</strong> org.jboss.netty.channel.ChannelHandlerContext;
<a class="jxr_linenumber" name="24" href="#24">24</a>  <strong class="jxr_keyword">import</strong> org.jboss.netty.channel.ChannelStateEvent;
<a class="jxr_linenumber" name="25" href="#25">25</a>  <strong class="jxr_keyword">import</strong> org.jboss.netty.channel.Channels;
<a class="jxr_linenumber" name="26" href="#26">26</a>  <strong class="jxr_keyword">import</strong> org.jboss.netty.channel.ExceptionEvent;
<a class="jxr_linenumber" name="27" href="#27">27</a>  <strong class="jxr_keyword">import</strong> org.jboss.netty.channel.MessageEvent;
<a class="jxr_linenumber" name="28" href="#28">28</a>  <strong class="jxr_keyword">import</strong> org.jboss.netty.channel.SimpleChannelUpstreamHandler;
<a class="jxr_linenumber" name="29" href="#29">29</a>  
<a class="jxr_linenumber" name="30" href="#30">30</a>  <strong class="jxr_keyword">import</strong> java.net.SocketAddress;
<a class="jxr_linenumber" name="31" href="#31">31</a>  <strong class="jxr_keyword">import</strong> java.nio.channels.ClosedChannelException;
<a class="jxr_linenumber" name="32" href="#32">32</a>  <strong class="jxr_keyword">import</strong> java.util.concurrent.atomic.AtomicInteger;
<a class="jxr_linenumber" name="33" href="#33">33</a>  
<a class="jxr_linenumber" name="34" href="#34">34</a>  <strong class="jxr_keyword">import</strong> <strong class="jxr_keyword">static</strong> org.jboss.netty.handler.codec.spdy.SpdyCodecUtil.*;
<a class="jxr_linenumber" name="35" href="#35">35</a>  
<a class="jxr_linenumber" name="36" href="#36">36</a>  <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="37" href="#37">37</a>  <em class="jxr_javadoccomment"> * Manages streams within a SPDY session.</em>
<a class="jxr_linenumber" name="38" href="#38">38</a>  <em class="jxr_javadoccomment"> */</em>
<a class="jxr_linenumber" name="39" href="#39">39</a>  <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">class</strong> <a href="../../../../../../org/jboss/netty/handler/codec/spdy/SpdySessionHandler.html">SpdySessionHandler</a> <strong class="jxr_keyword">extends</strong> <a href="../../../../../../org/jboss/netty/channel/SimpleChannelUpstreamHandler.html">SimpleChannelUpstreamHandler</a>
<a class="jxr_linenumber" name="40" href="#40">40</a>          <strong class="jxr_keyword">implements</strong> <a href="../../../../../../org/jboss/netty/channel/ChannelDownstreamHandler.html">ChannelDownstreamHandler</a> {
<a class="jxr_linenumber" name="41" href="#41">41</a>  
<a class="jxr_linenumber" name="42" href="#42">42</a>      <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> <a href="../../../../../../org/jboss/netty/handler/codec/spdy/SpdyProtocolException.html">SpdyProtocolException</a> PROTOCOL_EXCEPTION = <strong class="jxr_keyword">new</strong> <a href="../../../../../../org/jboss/netty/handler/codec/spdy/SpdyProtocolException.html">SpdyProtocolException</a>();
<a class="jxr_linenumber" name="43" href="#43">43</a>  
<a class="jxr_linenumber" name="44" href="#44">44</a>      <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> <a href="../../../../../../org/jboss/netty/handler/codec/spdy/SpdySession.html">SpdySession</a> spdySession = <strong class="jxr_keyword">new</strong> <a href="../../../../../../org/jboss/netty/handler/codec/spdy/SpdySession.html">SpdySession</a>();
<a class="jxr_linenumber" name="45" href="#45">45</a>      <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">volatile</strong> <strong class="jxr_keyword">int</strong> lastGoodStreamID;
<a class="jxr_linenumber" name="46" href="#46">46</a>  
<a class="jxr_linenumber" name="47" href="#47">47</a>      <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">volatile</strong> <strong class="jxr_keyword">int</strong> remoteConcurrentStreams;
<a class="jxr_linenumber" name="48" href="#48">48</a>      <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">volatile</strong> <strong class="jxr_keyword">int</strong> localConcurrentStreams;
<a class="jxr_linenumber" name="49" href="#49">49</a>      <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">volatile</strong> <strong class="jxr_keyword">int</strong> maxConcurrentStreams;
<a class="jxr_linenumber" name="50" href="#50">50</a>  
<a class="jxr_linenumber" name="51" href="#51">51</a>      <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> DEFAULT_WINDOW_SIZE = 64 * 1024; <em class="jxr_comment">// 64 KB default initial window size</em>
<a class="jxr_linenumber" name="52" href="#52">52</a>      <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">volatile</strong> <strong class="jxr_keyword">int</strong> initialSendWindowSize = DEFAULT_WINDOW_SIZE;
<a class="jxr_linenumber" name="53" href="#53">53</a>      <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">volatile</strong> <strong class="jxr_keyword">int</strong> initialReceiveWindowSize = DEFAULT_WINDOW_SIZE;
<a class="jxr_linenumber" name="54" href="#54">54</a>  
<a class="jxr_linenumber" name="55" href="#55">55</a>      <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> Object flowControlLock = <strong class="jxr_keyword">new</strong> Object();
<a class="jxr_linenumber" name="56" href="#56">56</a>  
<a class="jxr_linenumber" name="57" href="#57">57</a>      <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> AtomicInteger pings = <strong class="jxr_keyword">new</strong> AtomicInteger();
<a class="jxr_linenumber" name="58" href="#58">58</a>  
<a class="jxr_linenumber" name="59" href="#59">59</a>      <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">volatile</strong> <strong class="jxr_keyword">boolean</strong> sentGoAwayFrame;
<a class="jxr_linenumber" name="60" href="#60">60</a>      <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">volatile</strong> <strong class="jxr_keyword">boolean</strong> receivedGoAwayFrame;
<a class="jxr_linenumber" name="61" href="#61">61</a>  
<a class="jxr_linenumber" name="62" href="#62">62</a>      <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">volatile</strong> <a href="../../../../../../org/jboss/netty/channel/ChannelFuture.html">ChannelFuture</a> closeSessionFuture;
<a class="jxr_linenumber" name="63" href="#63">63</a>  
<a class="jxr_linenumber" name="64" href="#64">64</a>      <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">boolean</strong> server;
<a class="jxr_linenumber" name="65" href="#65">65</a>      <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">boolean</strong> flowControl;
<a class="jxr_linenumber" name="66" href="#66">66</a>  
<a class="jxr_linenumber" name="67" href="#67">67</a>      <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="68" href="#68">68</a>  <em class="jxr_javadoccomment">     * Creates a new SPDY/2 session handler.</em>
<a class="jxr_linenumber" name="69" href="#69">69</a>  <em class="jxr_javadoccomment">     *</em>
<a class="jxr_linenumber" name="70" href="#70">70</a>  <em class="jxr_javadoccomment">     * @param server {@code true} if and only if this session handler should</em>
<a class="jxr_linenumber" name="71" href="#71">71</a>  <em class="jxr_javadoccomment">     *               handle the server endpoint of the connection.</em>
<a class="jxr_linenumber" name="72" href="#72">72</a>  <em class="jxr_javadoccomment">     *               {@code false} if and only if this session handler should</em>
<a class="jxr_linenumber" name="73" href="#73">73</a>  <em class="jxr_javadoccomment">     *               handle the client endpoint of the connection.</em>
<a class="jxr_linenumber" name="74" href="#74">74</a>  <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="75" href="#75">75</a>      @Deprecated
<a class="jxr_linenumber" name="76" href="#76">76</a>      <strong class="jxr_keyword">public</strong> <a href="../../../../../../org/jboss/netty/handler/codec/spdy/SpdySessionHandler.html">SpdySessionHandler</a>(<strong class="jxr_keyword">boolean</strong> server) {
<a class="jxr_linenumber" name="77" href="#77">77</a>          <strong class="jxr_keyword">this</strong>(2, server);
<a class="jxr_linenumber" name="78" href="#78">78</a>      }
<a class="jxr_linenumber" name="79" href="#79">79</a>  
<a class="jxr_linenumber" name="80" href="#80">80</a>      <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="81" href="#81">81</a>  <em class="jxr_javadoccomment">     * Creates a new session handler.</em>
<a class="jxr_linenumber" name="82" href="#82">82</a>  <em class="jxr_javadoccomment">     *</em>
<a class="jxr_linenumber" name="83" href="#83">83</a>  <em class="jxr_javadoccomment">     * @param version the protocol version</em>
<a class="jxr_linenumber" name="84" href="#84">84</a>  <em class="jxr_javadoccomment">     * @param server  {@code true} if and only if this session handler should</em>
<a class="jxr_linenumber" name="85" href="#85">85</a>  <em class="jxr_javadoccomment">     *                handle the server endpoint of the connection.</em>
<a class="jxr_linenumber" name="86" href="#86">86</a>  <em class="jxr_javadoccomment">     *                {@code false} if and only if this session handler should</em>
<a class="jxr_linenumber" name="87" href="#87">87</a>  <em class="jxr_javadoccomment">     *                handle the client endpoint of the connection.</em>
<a class="jxr_linenumber" name="88" href="#88">88</a>  <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="89" href="#89">89</a>      <strong class="jxr_keyword">public</strong> <a href="../../../../../../org/jboss/netty/handler/codec/spdy/SpdySessionHandler.html">SpdySessionHandler</a>(<strong class="jxr_keyword">int</strong> version, <strong class="jxr_keyword">boolean</strong> server) {
<a class="jxr_linenumber" name="90" href="#90">90</a>          <strong class="jxr_keyword">if</strong> (version &lt; SPDY_MIN_VERSION || version &gt; SPDY_MAX_VERSION) {
<a class="jxr_linenumber" name="91" href="#91">91</a>              <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> IllegalArgumentException(
<a class="jxr_linenumber" name="92" href="#92">92</a>                      <span class="jxr_string">"unsupported version: "</span> + version);
<a class="jxr_linenumber" name="93" href="#93">93</a>          }
<a class="jxr_linenumber" name="94" href="#94">94</a>          <strong class="jxr_keyword">this</strong>.server = server;
<a class="jxr_linenumber" name="95" href="#95">95</a>          flowControl = version &gt;= 3;
<a class="jxr_linenumber" name="96" href="#96">96</a>      }
<a class="jxr_linenumber" name="97" href="#97">97</a>  
<a class="jxr_linenumber" name="98" href="#98">98</a>      @Override
<a class="jxr_linenumber" name="99" href="#99">99</a>      <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> messageReceived(<a href="../../../../../../org/jboss/netty/channel/ChannelHandlerContext.html">ChannelHandlerContext</a> ctx, <a href="../../../../../../org/jboss/netty/channel/MessageEvent.html">MessageEvent</a> e)
<a class="jxr_linenumber" name="100" href="#100">100</a>             <strong class="jxr_keyword">throws</strong> Exception {
<a class="jxr_linenumber" name="101" href="#101">101</a> 
<a class="jxr_linenumber" name="102" href="#102">102</a>         Object msg = e.getMessage();
<a class="jxr_linenumber" name="103" href="#103">103</a>         <strong class="jxr_keyword">if</strong> (msg instanceof SpdyDataFrame) {
<a class="jxr_linenumber" name="104" href="#104">104</a> 
<a class="jxr_linenumber" name="105" href="#105">105</a>             <em class="jxr_comment">/*</em>
<a class="jxr_linenumber" name="106" href="#106">106</a> <em class="jxr_comment">             * SPDY Data frame processing requirements:</em>
<a class="jxr_linenumber" name="107" href="#107">107</a> <em class="jxr_comment">             *</em>
<a class="jxr_linenumber" name="108" href="#108">108</a> <em class="jxr_comment">             * If an endpoint receives a data frame for a Stream-ID which is not open</em>
<a class="jxr_linenumber" name="109" href="#109">109</a> <em class="jxr_comment">             * and the endpoint has not sent a GOAWAY frame, it must issue a stream error</em>
<a class="jxr_linenumber" name="110" href="#110">110</a> <em class="jxr_comment">             * with the error code INVALID_STREAM for the Stream-ID.</em>
<a class="jxr_linenumber" name="111" href="#111">111</a> <em class="jxr_comment">             *</em>
<a class="jxr_linenumber" name="112" href="#112">112</a> <em class="jxr_comment">             * If an endpoint which created the stream receives a data frame before receiving</em>
<a class="jxr_linenumber" name="113" href="#113">113</a> <em class="jxr_comment">             * a SYN_REPLY on that stream, it is a protocol error, and the recipient must</em>
<a class="jxr_linenumber" name="114" href="#114">114</a> <em class="jxr_comment">             * issue a stream error with the status code PROTOCOL_ERROR for the Stream-ID.</em>
<a class="jxr_linenumber" name="115" href="#115">115</a> <em class="jxr_comment">             *</em>
<a class="jxr_linenumber" name="116" href="#116">116</a> <em class="jxr_comment">             * If an endpoint receives multiple data frames for invalid Stream-IDs,</em>
<a class="jxr_linenumber" name="117" href="#117">117</a> <em class="jxr_comment">             * it may close the session.</em>
<a class="jxr_linenumber" name="118" href="#118">118</a> <em class="jxr_comment">             *</em>
<a class="jxr_linenumber" name="119" href="#119">119</a> <em class="jxr_comment">             * If an endpoint refuses a stream it must ignore any data frames for that stream.</em>
<a class="jxr_linenumber" name="120" href="#120">120</a> <em class="jxr_comment">             *</em>
<a class="jxr_linenumber" name="121" href="#121">121</a> <em class="jxr_comment">             * If an endpoint receives a data frame after the stream is half-closed from the</em>
<a class="jxr_linenumber" name="122" href="#122">122</a> <em class="jxr_comment">             * sender, it must send a RST_STREAM frame with the status STREAM_ALREADY_CLOSED.</em>
<a class="jxr_linenumber" name="123" href="#123">123</a> <em class="jxr_comment">             *</em>
<a class="jxr_linenumber" name="124" href="#124">124</a> <em class="jxr_comment">             * If an endpoint receives a data frame after the stream is closed, it must send</em>
<a class="jxr_linenumber" name="125" href="#125">125</a> <em class="jxr_comment">             * a RST_STREAM frame with the status PROTOCOL_ERROR.</em>
<a class="jxr_linenumber" name="126" href="#126">126</a> <em class="jxr_comment">             */</em>
<a class="jxr_linenumber" name="127" href="#127">127</a> 
<a class="jxr_linenumber" name="128" href="#128">128</a>             <a href="../../../../../../org/jboss/netty/handler/codec/spdy/SpdyDataFrame.html">SpdyDataFrame</a> spdyDataFrame = (SpdyDataFrame) msg;
<a class="jxr_linenumber" name="129" href="#129">129</a>             <strong class="jxr_keyword">int</strong> streamID = spdyDataFrame.getStreamId();
<a class="jxr_linenumber" name="130" href="#130">130</a> 
<a class="jxr_linenumber" name="131" href="#131">131</a>             <em class="jxr_comment">// Check if we received a data frame for a Stream-ID which is not open</em>
<a class="jxr_linenumber" name="132" href="#132">132</a>             <strong class="jxr_keyword">if</strong> (!spdySession.isActiveStream(streamID)) {
<a class="jxr_linenumber" name="133" href="#133">133</a>                 <strong class="jxr_keyword">if</strong> (streamID &lt;= lastGoodStreamID) {
<a class="jxr_linenumber" name="134" href="#134">134</a>                     issueStreamError(ctx, e.getRemoteAddress(), streamID, SpdyStreamStatus.PROTOCOL_ERROR);
<a class="jxr_linenumber" name="135" href="#135">135</a>                 } <strong class="jxr_keyword">else</strong> <strong class="jxr_keyword">if</strong> (!sentGoAwayFrame) {
<a class="jxr_linenumber" name="136" href="#136">136</a>                     issueStreamError(ctx, e.getRemoteAddress(), streamID, SpdyStreamStatus.INVALID_STREAM);
<a class="jxr_linenumber" name="137" href="#137">137</a>                 }
<a class="jxr_linenumber" name="138" href="#138">138</a>                 <strong class="jxr_keyword">return</strong>;
<a class="jxr_linenumber" name="139" href="#139">139</a>             }
<a class="jxr_linenumber" name="140" href="#140">140</a> 
<a class="jxr_linenumber" name="141" href="#141">141</a>             <em class="jxr_comment">// Check if we received a data frame for a stream which is half-closed</em>
<a class="jxr_linenumber" name="142" href="#142">142</a>             <strong class="jxr_keyword">if</strong> (spdySession.isRemoteSideClosed(streamID)) {
<a class="jxr_linenumber" name="143" href="#143">143</a>                 issueStreamError(ctx, e.getRemoteAddress(), streamID, SpdyStreamStatus.STREAM_ALREADY_CLOSED);
<a class="jxr_linenumber" name="144" href="#144">144</a>                 <strong class="jxr_keyword">return</strong>;
<a class="jxr_linenumber" name="145" href="#145">145</a>             }
<a class="jxr_linenumber" name="146" href="#146">146</a> 
<a class="jxr_linenumber" name="147" href="#147">147</a>             <em class="jxr_comment">// Check if we received a data frame before receiving a SYN_REPLY</em>
<a class="jxr_linenumber" name="148" href="#148">148</a>             <strong class="jxr_keyword">if</strong> (!isRemoteInitiatedID(streamID) &amp;&amp; !spdySession.hasReceivedReply(streamID)) {
<a class="jxr_linenumber" name="149" href="#149">149</a>                 issueStreamError(ctx, e.getRemoteAddress(), streamID, SpdyStreamStatus.PROTOCOL_ERROR);
<a class="jxr_linenumber" name="150" href="#150">150</a>                 <strong class="jxr_keyword">return</strong>;
<a class="jxr_linenumber" name="151" href="#151">151</a>             }
<a class="jxr_linenumber" name="152" href="#152">152</a> 
<a class="jxr_linenumber" name="153" href="#153">153</a>             <em class="jxr_comment">/*</em>
<a class="jxr_linenumber" name="154" href="#154">154</a> <em class="jxr_comment">            * SPDY Data frame flow control processing requirements:</em>
<a class="jxr_linenumber" name="155" href="#155">155</a> <em class="jxr_comment">            *</em>
<a class="jxr_linenumber" name="156" href="#156">156</a> <em class="jxr_comment">            * Recipient should not send a WINDOW_UPDATE frame as it consumes the last data frame.</em>
<a class="jxr_linenumber" name="157" href="#157">157</a> <em class="jxr_comment">            */</em>
<a class="jxr_linenumber" name="158" href="#158">158</a> 
<a class="jxr_linenumber" name="159" href="#159">159</a>             <strong class="jxr_keyword">if</strong> (flowControl) {
<a class="jxr_linenumber" name="160" href="#160">160</a>                 <em class="jxr_comment">// Update receive window size</em>
<a class="jxr_linenumber" name="161" href="#161">161</a>                 <strong class="jxr_keyword">int</strong> deltaWindowSize = -1 * spdyDataFrame.getData().readableBytes();
<a class="jxr_linenumber" name="162" href="#162">162</a>                 <strong class="jxr_keyword">int</strong> newWindowSize = spdySession.updateReceiveWindowSize(streamID, deltaWindowSize);
<a class="jxr_linenumber" name="163" href="#163">163</a> 
<a class="jxr_linenumber" name="164" href="#164">164</a>                 <em class="jxr_comment">// Window size can become negative if we sent a SETTINGS frame that reduces the</em>
<a class="jxr_linenumber" name="165" href="#165">165</a>                 <em class="jxr_comment">// size of the transfer window after the peer has written data frames.</em>
<a class="jxr_linenumber" name="166" href="#166">166</a>                 <em class="jxr_comment">// The value is bounded by the length that SETTINGS frame decrease the window.</em>
<a class="jxr_linenumber" name="167" href="#167">167</a>                 <em class="jxr_comment">// This difference is stored for the session when writing the SETTINGS frame</em>
<a class="jxr_linenumber" name="168" href="#168">168</a>                 <em class="jxr_comment">// and is cleared once we send a WINDOW_UPDATE frame.</em>
<a class="jxr_linenumber" name="169" href="#169">169</a>                 <strong class="jxr_keyword">if</strong> (newWindowSize &lt; spdySession.getReceiveWindowSizeLowerBound(streamID)) {
<a class="jxr_linenumber" name="170" href="#170">170</a>                     issueStreamError(ctx, e.getRemoteAddress(), streamID, SpdyStreamStatus.FLOW_CONTROL_ERROR);
<a class="jxr_linenumber" name="171" href="#171">171</a>                     <strong class="jxr_keyword">return</strong>;
<a class="jxr_linenumber" name="172" href="#172">172</a>                 }
<a class="jxr_linenumber" name="173" href="#173">173</a> 
<a class="jxr_linenumber" name="174" href="#174">174</a>                 <em class="jxr_comment">// Window size became negative due to sender writing frame before receiving SETTINGS</em>
<a class="jxr_linenumber" name="175" href="#175">175</a>                 <em class="jxr_comment">// Send data frames upstream in initialReceiveWindowSize chunks</em>
<a class="jxr_linenumber" name="176" href="#176">176</a>                 <strong class="jxr_keyword">if</strong> (newWindowSize &lt; 0) {
<a class="jxr_linenumber" name="177" href="#177">177</a>                     <strong class="jxr_keyword">while</strong> (spdyDataFrame.getData().readableBytes() &gt; initialReceiveWindowSize) {
<a class="jxr_linenumber" name="178" href="#178">178</a>                         <a href="../../../../../../org/jboss/netty/handler/codec/spdy/SpdyDataFrame.html">SpdyDataFrame</a> partialDataFrame = <strong class="jxr_keyword">new</strong> <a href="../../../../../../org/jboss/netty/handler/codec/spdy/DefaultSpdyDataFrame.html">DefaultSpdyDataFrame</a>(streamID);
<a class="jxr_linenumber" name="179" href="#179">179</a>                         partialDataFrame.setData(spdyDataFrame.getData().readSlice(initialReceiveWindowSize));
<a class="jxr_linenumber" name="180" href="#180">180</a>                         Channels.fireMessageReceived(ctx, partialDataFrame, e.getRemoteAddress());
<a class="jxr_linenumber" name="181" href="#181">181</a>                     }
<a class="jxr_linenumber" name="182" href="#182">182</a>                 }
<a class="jxr_linenumber" name="183" href="#183">183</a> 
<a class="jxr_linenumber" name="184" href="#184">184</a>                 <em class="jxr_comment">// Send a WINDOW_UPDATE frame if less than half the window size remains</em>
<a class="jxr_linenumber" name="185" href="#185">185</a>                 <strong class="jxr_keyword">if</strong> (newWindowSize &lt;= initialReceiveWindowSize / 2 &amp;&amp; !spdyDataFrame.isLast()) {
<a class="jxr_linenumber" name="186" href="#186">186</a>                     deltaWindowSize = initialReceiveWindowSize - newWindowSize;
<a class="jxr_linenumber" name="187" href="#187">187</a>                     spdySession.updateReceiveWindowSize(streamID, deltaWindowSize);
<a class="jxr_linenumber" name="188" href="#188">188</a>                     <a href="../../../../../../org/jboss/netty/handler/codec/spdy/SpdyWindowUpdateFrame.html">SpdyWindowUpdateFrame</a> spdyWindowUpdateFrame =
<a class="jxr_linenumber" name="189" href="#189">189</a>                             <strong class="jxr_keyword">new</strong> <a href="../../../../../../org/jboss/netty/handler/codec/spdy/DefaultSpdyWindowUpdateFrame.html">DefaultSpdyWindowUpdateFrame</a>(streamID, deltaWindowSize);
<a class="jxr_linenumber" name="190" href="#190">190</a>                     Channels.write(
<a class="jxr_linenumber" name="191" href="#191">191</a>                             ctx, Channels.future(e.getChannel()), spdyWindowUpdateFrame, e.getRemoteAddress());
<a class="jxr_linenumber" name="192" href="#192">192</a>                 }
<a class="jxr_linenumber" name="193" href="#193">193</a>             }
<a class="jxr_linenumber" name="194" href="#194">194</a> 
<a class="jxr_linenumber" name="195" href="#195">195</a>             <em class="jxr_comment">// Close the remote side of the stream if this is the last frame</em>
<a class="jxr_linenumber" name="196" href="#196">196</a>             <strong class="jxr_keyword">if</strong> (spdyDataFrame.isLast()) {
<a class="jxr_linenumber" name="197" href="#197">197</a>                 halfCloseStream(streamID, <strong class="jxr_keyword">true</strong>);
<a class="jxr_linenumber" name="198" href="#198">198</a>             }
<a class="jxr_linenumber" name="199" href="#199">199</a> 
<a class="jxr_linenumber" name="200" href="#200">200</a>         } <strong class="jxr_keyword">else</strong> <strong class="jxr_keyword">if</strong> (msg instanceof SpdySynStreamFrame) {
<a class="jxr_linenumber" name="201" href="#201">201</a> 
<a class="jxr_linenumber" name="202" href="#202">202</a>             <em class="jxr_comment">/*</em>
<a class="jxr_linenumber" name="203" href="#203">203</a> <em class="jxr_comment">             * SPDY SYN_STREAM frame processing requirements:</em>
<a class="jxr_linenumber" name="204" href="#204">204</a> <em class="jxr_comment">             *</em>
<a class="jxr_linenumber" name="205" href="#205">205</a> <em class="jxr_comment">             * If an endpoint receives a SYN_STREAM with a Stream-ID that is less than</em>
<a class="jxr_linenumber" name="206" href="#206">206</a> <em class="jxr_comment">             * any previously received SYN_STREAM, it must issue a session error with</em>
<a class="jxr_linenumber" name="207" href="#207">207</a> <em class="jxr_comment">             * the status PROTOCOL_ERROR.</em>
<a class="jxr_linenumber" name="208" href="#208">208</a> <em class="jxr_comment">             *</em>
<a class="jxr_linenumber" name="209" href="#209">209</a> <em class="jxr_comment">             * If an endpoint receives multiple SYN_STREAM frames with the same active</em>
<a class="jxr_linenumber" name="210" href="#210">210</a> <em class="jxr_comment">             * Stream-ID, it must issue a stream error with the status code PROTOCOL_ERROR.</em>
<a class="jxr_linenumber" name="211" href="#211">211</a> <em class="jxr_comment">             *</em>
<a class="jxr_linenumber" name="212" href="#212">212</a> <em class="jxr_comment">             * The recipient can reject a stream by sending a stream error with the</em>
<a class="jxr_linenumber" name="213" href="#213">213</a> <em class="jxr_comment">             * status code REFUSED_STREAM.</em>
<a class="jxr_linenumber" name="214" href="#214">214</a> <em class="jxr_comment">             */</em>
<a class="jxr_linenumber" name="215" href="#215">215</a> 
<a class="jxr_linenumber" name="216" href="#216">216</a>             <a href="../../../../../../org/jboss/netty/handler/codec/spdy/SpdySynStreamFrame.html">SpdySynStreamFrame</a> spdySynStreamFrame = (SpdySynStreamFrame) msg;
<a class="jxr_linenumber" name="217" href="#217">217</a>             <strong class="jxr_keyword">int</strong> streamID = spdySynStreamFrame.getStreamId();
<a class="jxr_linenumber" name="218" href="#218">218</a> 
<a class="jxr_linenumber" name="219" href="#219">219</a>             <em class="jxr_comment">// Check if we received a valid SYN_STREAM frame</em>
<a class="jxr_linenumber" name="220" href="#220">220</a>             <strong class="jxr_keyword">if</strong> (spdySynStreamFrame.isInvalid() ||
<a class="jxr_linenumber" name="221" href="#221">221</a>                 !isRemoteInitiatedID(streamID) ||
<a class="jxr_linenumber" name="222" href="#222">222</a>                 spdySession.isActiveStream(streamID)) {
<a class="jxr_linenumber" name="223" href="#223">223</a>                 issueStreamError(ctx, e.getRemoteAddress(), streamID, SpdyStreamStatus.PROTOCOL_ERROR);
<a class="jxr_linenumber" name="224" href="#224">224</a>                 <strong class="jxr_keyword">return</strong>;
<a class="jxr_linenumber" name="225" href="#225">225</a>             }
<a class="jxr_linenumber" name="226" href="#226">226</a> 
<a class="jxr_linenumber" name="227" href="#227">227</a>             <em class="jxr_comment">// Stream-IDs must be monotonically increasing</em>
<a class="jxr_linenumber" name="228" href="#228">228</a>             <strong class="jxr_keyword">if</strong> (streamID &lt;= lastGoodStreamID) {
<a class="jxr_linenumber" name="229" href="#229">229</a>                 issueSessionError(ctx, e.getChannel(), e.getRemoteAddress(), SpdySessionStatus.PROTOCOL_ERROR);
<a class="jxr_linenumber" name="230" href="#230">230</a>                 <strong class="jxr_keyword">return</strong>;
<a class="jxr_linenumber" name="231" href="#231">231</a>             }
<a class="jxr_linenumber" name="232" href="#232">232</a> 
<a class="jxr_linenumber" name="233" href="#233">233</a>             <em class="jxr_comment">// Try to accept the stream</em>
<a class="jxr_linenumber" name="234" href="#234">234</a>             byte priority = spdySynStreamFrame.getPriority();
<a class="jxr_linenumber" name="235" href="#235">235</a>             <strong class="jxr_keyword">boolean</strong> remoteSideClosed = spdySynStreamFrame.isLast();
<a class="jxr_linenumber" name="236" href="#236">236</a>             <strong class="jxr_keyword">boolean</strong> localSideClosed = spdySynStreamFrame.isUnidirectional();
<a class="jxr_linenumber" name="237" href="#237">237</a>             <strong class="jxr_keyword">if</strong> (!acceptStream(streamID, priority, remoteSideClosed, localSideClosed)) {
<a class="jxr_linenumber" name="238" href="#238">238</a>                 issueStreamError(ctx, e.getRemoteAddress(), streamID, SpdyStreamStatus.REFUSED_STREAM);
<a class="jxr_linenumber" name="239" href="#239">239</a>                 <strong class="jxr_keyword">return</strong>;
<a class="jxr_linenumber" name="240" href="#240">240</a>             }
<a class="jxr_linenumber" name="241" href="#241">241</a> 
<a class="jxr_linenumber" name="242" href="#242">242</a>         } <strong class="jxr_keyword">else</strong> <strong class="jxr_keyword">if</strong> (msg instanceof SpdySynReplyFrame) {
<a class="jxr_linenumber" name="243" href="#243">243</a> 
<a class="jxr_linenumber" name="244" href="#244">244</a>             <em class="jxr_comment">/*</em>
<a class="jxr_linenumber" name="245" href="#245">245</a> <em class="jxr_comment">             * SPDY SYN_REPLY frame processing requirements:</em>
<a class="jxr_linenumber" name="246" href="#246">246</a> <em class="jxr_comment">             *</em>
<a class="jxr_linenumber" name="247" href="#247">247</a> <em class="jxr_comment">             * If an endpoint receives multiple SYN_REPLY frames for the same active Stream-ID</em>
<a class="jxr_linenumber" name="248" href="#248">248</a> <em class="jxr_comment">             * it must issue a stream error with the status code STREAM_IN_USE.</em>
<a class="jxr_linenumber" name="249" href="#249">249</a> <em class="jxr_comment">             */</em>
<a class="jxr_linenumber" name="250" href="#250">250</a> 
<a class="jxr_linenumber" name="251" href="#251">251</a>             <a href="../../../../../../org/jboss/netty/handler/codec/spdy/SpdySynReplyFrame.html">SpdySynReplyFrame</a> spdySynReplyFrame = (SpdySynReplyFrame) msg;
<a class="jxr_linenumber" name="252" href="#252">252</a>             <strong class="jxr_keyword">int</strong> streamID = spdySynReplyFrame.getStreamId();
<a class="jxr_linenumber" name="253" href="#253">253</a> 
<a class="jxr_linenumber" name="254" href="#254">254</a>             <em class="jxr_comment">// Check if we received a valid SYN_REPLY frame</em>
<a class="jxr_linenumber" name="255" href="#255">255</a>             <strong class="jxr_keyword">if</strong> (spdySynReplyFrame.isInvalid() ||
<a class="jxr_linenumber" name="256" href="#256">256</a>                 isRemoteInitiatedID(streamID) ||
<a class="jxr_linenumber" name="257" href="#257">257</a>                 spdySession.isRemoteSideClosed(streamID)) {
<a class="jxr_linenumber" name="258" href="#258">258</a>                 issueStreamError(ctx, e.getRemoteAddress(), streamID, SpdyStreamStatus.INVALID_STREAM);
<a class="jxr_linenumber" name="259" href="#259">259</a>                 <strong class="jxr_keyword">return</strong>;
<a class="jxr_linenumber" name="260" href="#260">260</a>             }
<a class="jxr_linenumber" name="261" href="#261">261</a> 
<a class="jxr_linenumber" name="262" href="#262">262</a>             <em class="jxr_comment">// Check if we have received multiple frames for the same Stream-ID</em>
<a class="jxr_linenumber" name="263" href="#263">263</a>             <strong class="jxr_keyword">if</strong> (spdySession.hasReceivedReply(streamID)) {
<a class="jxr_linenumber" name="264" href="#264">264</a>                 issueStreamError(ctx, e.getRemoteAddress(), streamID, SpdyStreamStatus.STREAM_IN_USE);
<a class="jxr_linenumber" name="265" href="#265">265</a>                 <strong class="jxr_keyword">return</strong>;
<a class="jxr_linenumber" name="266" href="#266">266</a>             }
<a class="jxr_linenumber" name="267" href="#267">267</a> 
<a class="jxr_linenumber" name="268" href="#268">268</a>             spdySession.receivedReply(streamID);
<a class="jxr_linenumber" name="269" href="#269">269</a> 
<a class="jxr_linenumber" name="270" href="#270">270</a>             <em class="jxr_comment">// Close the remote side of the stream if this is the last frame</em>
<a class="jxr_linenumber" name="271" href="#271">271</a>             <strong class="jxr_keyword">if</strong> (spdySynReplyFrame.isLast()) {
<a class="jxr_linenumber" name="272" href="#272">272</a>                 halfCloseStream(streamID, <strong class="jxr_keyword">true</strong>);
<a class="jxr_linenumber" name="273" href="#273">273</a>             }
<a class="jxr_linenumber" name="274" href="#274">274</a> 
<a class="jxr_linenumber" name="275" href="#275">275</a>         } <strong class="jxr_keyword">else</strong> <strong class="jxr_keyword">if</strong> (msg instanceof SpdyRstStreamFrame) {
<a class="jxr_linenumber" name="276" href="#276">276</a> 
<a class="jxr_linenumber" name="277" href="#277">277</a>             <em class="jxr_comment">/*</em>
<a class="jxr_linenumber" name="278" href="#278">278</a> <em class="jxr_comment">             * SPDY RST_STREAM frame processing requirements:</em>
<a class="jxr_linenumber" name="279" href="#279">279</a> <em class="jxr_comment">             *</em>
<a class="jxr_linenumber" name="280" href="#280">280</a> <em class="jxr_comment">             * After receiving a RST_STREAM on a stream, the receiver must not send</em>
<a class="jxr_linenumber" name="281" href="#281">281</a> <em class="jxr_comment">             * additional frames on that stream.</em>
<a class="jxr_linenumber" name="282" href="#282">282</a> <em class="jxr_comment">             *</em>
<a class="jxr_linenumber" name="283" href="#283">283</a> <em class="jxr_comment">             * An endpoint must not send a RST_STREAM in response to a RST_STREAM.</em>
<a class="jxr_linenumber" name="284" href="#284">284</a> <em class="jxr_comment">             */</em>
<a class="jxr_linenumber" name="285" href="#285">285</a> 
<a class="jxr_linenumber" name="286" href="#286">286</a>             <a href="../../../../../../org/jboss/netty/handler/codec/spdy/SpdyRstStreamFrame.html">SpdyRstStreamFrame</a> spdyRstStreamFrame = (SpdyRstStreamFrame) msg;
<a class="jxr_linenumber" name="287" href="#287">287</a>             removeStream(spdyRstStreamFrame.getStreamId());
<a class="jxr_linenumber" name="288" href="#288">288</a> 
<a class="jxr_linenumber" name="289" href="#289">289</a>         } <strong class="jxr_keyword">else</strong> <strong class="jxr_keyword">if</strong> (msg instanceof SpdySettingsFrame) {
<a class="jxr_linenumber" name="290" href="#290">290</a> 
<a class="jxr_linenumber" name="291" href="#291">291</a>             <a href="../../../../../../org/jboss/netty/handler/codec/spdy/SpdySettingsFrame.html">SpdySettingsFrame</a> spdySettingsFrame = (SpdySettingsFrame) msg;
<a class="jxr_linenumber" name="292" href="#292">292</a> 
<a class="jxr_linenumber" name="293" href="#293">293</a>             <strong class="jxr_keyword">int</strong> newConcurrentStreams =
<a class="jxr_linenumber" name="294" href="#294">294</a>                 spdySettingsFrame.getValue(SpdySettingsFrame.SETTINGS_MAX_CONCURRENT_STREAMS);
<a class="jxr_linenumber" name="295" href="#295">295</a>             <strong class="jxr_keyword">if</strong> (newConcurrentStreams &gt;= 0) {
<a class="jxr_linenumber" name="296" href="#296">296</a>                 updateConcurrentStreams(newConcurrentStreams, <strong class="jxr_keyword">true</strong>);
<a class="jxr_linenumber" name="297" href="#297">297</a>             }
<a class="jxr_linenumber" name="298" href="#298">298</a> 
<a class="jxr_linenumber" name="299" href="#299">299</a>             <em class="jxr_comment">// Persistence flag are inconsistent with the use of SETTINGS to communicate</em>
<a class="jxr_linenumber" name="300" href="#300">300</a>             <em class="jxr_comment">// the initial window size. Remove flags from the sender requesting that the</em>
<a class="jxr_linenumber" name="301" href="#301">301</a>             <em class="jxr_comment">// value be persisted. Remove values that the sender indicates are persisted.</em>
<a class="jxr_linenumber" name="302" href="#302">302</a>             <strong class="jxr_keyword">if</strong> (spdySettingsFrame.isPersisted(SpdySettingsFrame.SETTINGS_INITIAL_WINDOW_SIZE)) {
<a class="jxr_linenumber" name="303" href="#303">303</a>                 spdySettingsFrame.removeValue(SpdySettingsFrame.SETTINGS_INITIAL_WINDOW_SIZE);
<a class="jxr_linenumber" name="304" href="#304">304</a>             }
<a class="jxr_linenumber" name="305" href="#305">305</a>             spdySettingsFrame.setPersistValue(SpdySettingsFrame.SETTINGS_INITIAL_WINDOW_SIZE, false);
<a class="jxr_linenumber" name="306" href="#306">306</a> 
<a class="jxr_linenumber" name="307" href="#307">307</a>             <strong class="jxr_keyword">if</strong> (flowControl) {
<a class="jxr_linenumber" name="308" href="#308">308</a>                 <strong class="jxr_keyword">int</strong> newInitialWindowSize =
<a class="jxr_linenumber" name="309" href="#309">309</a>                     spdySettingsFrame.getValue(SpdySettingsFrame.SETTINGS_INITIAL_WINDOW_SIZE);
<a class="jxr_linenumber" name="310" href="#310">310</a>                 <strong class="jxr_keyword">if</strong> (newInitialWindowSize &gt;= 0) {
<a class="jxr_linenumber" name="311" href="#311">311</a>                     updateInitialSendWindowSize(newInitialWindowSize);
<a class="jxr_linenumber" name="312" href="#312">312</a>                 }
<a class="jxr_linenumber" name="313" href="#313">313</a>             }
<a class="jxr_linenumber" name="314" href="#314">314</a> 
<a class="jxr_linenumber" name="315" href="#315">315</a>         } <strong class="jxr_keyword">else</strong> <strong class="jxr_keyword">if</strong> (msg instanceof SpdyPingFrame) {
<a class="jxr_linenumber" name="316" href="#316">316</a> 
<a class="jxr_linenumber" name="317" href="#317">317</a>             <em class="jxr_comment">/*</em>
<a class="jxr_linenumber" name="318" href="#318">318</a> <em class="jxr_comment">             * SPDY PING frame processing requirements:</em>
<a class="jxr_linenumber" name="319" href="#319">319</a> <em class="jxr_comment">             *</em>
<a class="jxr_linenumber" name="320" href="#320">320</a> <em class="jxr_comment">             * Receivers of a PING frame should send an identical frame to the sender</em>
<a class="jxr_linenumber" name="321" href="#321">321</a> <em class="jxr_comment">             * as soon as possible.</em>
<a class="jxr_linenumber" name="322" href="#322">322</a> <em class="jxr_comment">             *</em>
<a class="jxr_linenumber" name="323" href="#323">323</a> <em class="jxr_comment">             * Receivers of a PING frame must ignore frames that it did not initiate</em>
<a class="jxr_linenumber" name="324" href="#324">324</a> <em class="jxr_comment">             */</em>
<a class="jxr_linenumber" name="325" href="#325">325</a> 
<a class="jxr_linenumber" name="326" href="#326">326</a>             <a href="../../../../../../org/jboss/netty/handler/codec/spdy/SpdyPingFrame.html">SpdyPingFrame</a> spdyPingFrame = (SpdyPingFrame) msg;
<a class="jxr_linenumber" name="327" href="#327">327</a> 
<a class="jxr_linenumber" name="328" href="#328">328</a>             <strong class="jxr_keyword">if</strong> (isRemoteInitiatedID(spdyPingFrame.getId())) {
<a class="jxr_linenumber" name="329" href="#329">329</a>                 Channels.write(ctx, Channels.future(e.getChannel()), spdyPingFrame, e.getRemoteAddress());
<a class="jxr_linenumber" name="330" href="#330">330</a>                 <strong class="jxr_keyword">return</strong>;
<a class="jxr_linenumber" name="331" href="#331">331</a>             }
<a class="jxr_linenumber" name="332" href="#332">332</a> 
<a class="jxr_linenumber" name="333" href="#333">333</a>             <em class="jxr_comment">// Note: only checks that there are outstanding pings since uniqueness is not enforced</em>
<a class="jxr_linenumber" name="334" href="#334">334</a>             <strong class="jxr_keyword">if</strong> (pings.get() == 0) {
<a class="jxr_linenumber" name="335" href="#335">335</a>                 <strong class="jxr_keyword">return</strong>;
<a class="jxr_linenumber" name="336" href="#336">336</a>             }
<a class="jxr_linenumber" name="337" href="#337">337</a>             pings.getAndDecrement();
<a class="jxr_linenumber" name="338" href="#338">338</a> 
<a class="jxr_linenumber" name="339" href="#339">339</a>         } <strong class="jxr_keyword">else</strong> <strong class="jxr_keyword">if</strong> (msg instanceof SpdyGoAwayFrame) {
<a class="jxr_linenumber" name="340" href="#340">340</a> 
<a class="jxr_linenumber" name="341" href="#341">341</a>             receivedGoAwayFrame = <strong class="jxr_keyword">true</strong>;
<a class="jxr_linenumber" name="342" href="#342">342</a> 
<a class="jxr_linenumber" name="343" href="#343">343</a>         } <strong class="jxr_keyword">else</strong> <strong class="jxr_keyword">if</strong> (msg instanceof SpdyHeadersFrame) {
<a class="jxr_linenumber" name="344" href="#344">344</a> 
<a class="jxr_linenumber" name="345" href="#345">345</a>             <a href="../../../../../../org/jboss/netty/handler/codec/spdy/SpdyHeadersFrame.html">SpdyHeadersFrame</a> spdyHeadersFrame = (SpdyHeadersFrame) msg;
<a class="jxr_linenumber" name="346" href="#346">346</a>             <strong class="jxr_keyword">int</strong> streamID = spdyHeadersFrame.getStreamId();
<a class="jxr_linenumber" name="347" href="#347">347</a> 
<a class="jxr_linenumber" name="348" href="#348">348</a>             <em class="jxr_comment">// Check if we received a valid HEADERS frame</em>
<a class="jxr_linenumber" name="349" href="#349">349</a>             <strong class="jxr_keyword">if</strong> (spdyHeadersFrame.isInvalid()) {
<a class="jxr_linenumber" name="350" href="#350">350</a>                 issueStreamError(ctx, e.getRemoteAddress(), streamID, SpdyStreamStatus.PROTOCOL_ERROR);
<a class="jxr_linenumber" name="351" href="#351">351</a>                 <strong class="jxr_keyword">return</strong>;
<a class="jxr_linenumber" name="352" href="#352">352</a>             }
<a class="jxr_linenumber" name="353" href="#353">353</a> 
<a class="jxr_linenumber" name="354" href="#354">354</a>             <strong class="jxr_keyword">if</strong> (spdySession.isRemoteSideClosed(streamID)) {
<a class="jxr_linenumber" name="355" href="#355">355</a>                 issueStreamError(ctx, e.getRemoteAddress(), streamID, SpdyStreamStatus.INVALID_STREAM);
<a class="jxr_linenumber" name="356" href="#356">356</a>                 <strong class="jxr_keyword">return</strong>;
<a class="jxr_linenumber" name="357" href="#357">357</a>             }
<a class="jxr_linenumber" name="358" href="#358">358</a> 
<a class="jxr_linenumber" name="359" href="#359">359</a>             <em class="jxr_comment">// Close the remote side of the stream if this is the last frame</em>
<a class="jxr_linenumber" name="360" href="#360">360</a>             <strong class="jxr_keyword">if</strong> (spdyHeadersFrame.isLast()) {
<a class="jxr_linenumber" name="361" href="#361">361</a>                 halfCloseStream(streamID, <strong class="jxr_keyword">true</strong>);
<a class="jxr_linenumber" name="362" href="#362">362</a>             }
<a class="jxr_linenumber" name="363" href="#363">363</a> 
<a class="jxr_linenumber" name="364" href="#364">364</a>         } <strong class="jxr_keyword">else</strong> <strong class="jxr_keyword">if</strong> (msg instanceof SpdyWindowUpdateFrame) {
<a class="jxr_linenumber" name="365" href="#365">365</a> 
<a class="jxr_linenumber" name="366" href="#366">366</a>             <em class="jxr_comment">/*</em>
<a class="jxr_linenumber" name="367" href="#367">367</a> <em class="jxr_comment">             * SPDY WINDOW_UPDATE frame processing requirements:</em>
<a class="jxr_linenumber" name="368" href="#368">368</a> <em class="jxr_comment">             *</em>
<a class="jxr_linenumber" name="369" href="#369">369</a> <em class="jxr_comment">             * Receivers of a WINDOW_UPDATE that cause the window size to exceed 2^31</em>
<a class="jxr_linenumber" name="370" href="#370">370</a> <em class="jxr_comment">             * must send a RST_STREAM with the status code FLOW_CONTROL_ERROR.</em>
<a class="jxr_linenumber" name="371" href="#371">371</a> <em class="jxr_comment">             *</em>
<a class="jxr_linenumber" name="372" href="#372">372</a> <em class="jxr_comment">             * Sender should ignore all WINDOW_UPDATE frames associated with a stream</em>
<a class="jxr_linenumber" name="373" href="#373">373</a> <em class="jxr_comment">             * after sending the last frame for the stream.</em>
<a class="jxr_linenumber" name="374" href="#374">374</a> <em class="jxr_comment">             */</em>
<a class="jxr_linenumber" name="375" href="#375">375</a> 
<a class="jxr_linenumber" name="376" href="#376">376</a>             <strong class="jxr_keyword">if</strong> (flowControl) {
<a class="jxr_linenumber" name="377" href="#377">377</a>                 <a href="../../../../../../org/jboss/netty/handler/codec/spdy/SpdyWindowUpdateFrame.html">SpdyWindowUpdateFrame</a> spdyWindowUpdateFrame = (SpdyWindowUpdateFrame) msg;
<a class="jxr_linenumber" name="378" href="#378">378</a>                 <strong class="jxr_keyword">int</strong> streamID = spdyWindowUpdateFrame.getStreamId();
<a class="jxr_linenumber" name="379" href="#379">379</a>                 <strong class="jxr_keyword">int</strong> deltaWindowSize = spdyWindowUpdateFrame.getDeltaWindowSize();
<a class="jxr_linenumber" name="380" href="#380">380</a> 
<a class="jxr_linenumber" name="381" href="#381">381</a>                 <em class="jxr_comment">// Ignore frames for half-closed streams</em>
<a class="jxr_linenumber" name="382" href="#382">382</a>                 <strong class="jxr_keyword">if</strong> (spdySession.isLocalSideClosed(streamID)) {
<a class="jxr_linenumber" name="383" href="#383">383</a>                     <strong class="jxr_keyword">return</strong>;
<a class="jxr_linenumber" name="384" href="#384">384</a>                 }
<a class="jxr_linenumber" name="385" href="#385">385</a> 
<a class="jxr_linenumber" name="386" href="#386">386</a>                 <em class="jxr_comment">// Check for numerical overflow</em>
<a class="jxr_linenumber" name="387" href="#387">387</a>                 <strong class="jxr_keyword">if</strong> (spdySession.getSendWindowSize(streamID) &gt; Integer.MAX_VALUE - deltaWindowSize) {
<a class="jxr_linenumber" name="388" href="#388">388</a>                     issueStreamError(ctx, e.getRemoteAddress(), streamID, SpdyStreamStatus.FLOW_CONTROL_ERROR);
<a class="jxr_linenumber" name="389" href="#389">389</a>                     <strong class="jxr_keyword">return</strong>;
<a class="jxr_linenumber" name="390" href="#390">390</a>                 }
<a class="jxr_linenumber" name="391" href="#391">391</a> 
<a class="jxr_linenumber" name="392" href="#392">392</a>                 updateSendWindowSize(ctx, streamID, deltaWindowSize);
<a class="jxr_linenumber" name="393" href="#393">393</a>             }
<a class="jxr_linenumber" name="394" href="#394">394</a>             <strong class="jxr_keyword">return</strong>;
<a class="jxr_linenumber" name="395" href="#395">395</a>         }
<a class="jxr_linenumber" name="396" href="#396">396</a> 
<a class="jxr_linenumber" name="397" href="#397">397</a>         <strong class="jxr_keyword">super</strong>.messageReceived(ctx, e);
<a class="jxr_linenumber" name="398" href="#398">398</a>     }
<a class="jxr_linenumber" name="399" href="#399">399</a> 
<a class="jxr_linenumber" name="400" href="#400">400</a>     @Override
<a class="jxr_linenumber" name="401" href="#401">401</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> exceptionCaught(<a href="../../../../../../org/jboss/netty/channel/ChannelHandlerContext.html">ChannelHandlerContext</a> ctx, <a href="../../../../../../org/jboss/netty/channel/ExceptionEvent.html">ExceptionEvent</a> e)
<a class="jxr_linenumber" name="402" href="#402">402</a>             <strong class="jxr_keyword">throws</strong> Exception {
<a class="jxr_linenumber" name="403" href="#403">403</a> 
<a class="jxr_linenumber" name="404" href="#404">404</a>         Throwable cause = e.getCause();
<a class="jxr_linenumber" name="405" href="#405">405</a>         <strong class="jxr_keyword">if</strong> (cause instanceof SpdyProtocolException) {
<a class="jxr_linenumber" name="406" href="#406">406</a>             issueSessionError(ctx, e.getChannel(), <strong class="jxr_keyword">null</strong>, SpdySessionStatus.PROTOCOL_ERROR);
<a class="jxr_linenumber" name="407" href="#407">407</a>         }
<a class="jxr_linenumber" name="408" href="#408">408</a> 
<a class="jxr_linenumber" name="409" href="#409">409</a>         <strong class="jxr_keyword">super</strong>.exceptionCaught(ctx, e);
<a class="jxr_linenumber" name="410" href="#410">410</a>     }
<a class="jxr_linenumber" name="411" href="#411">411</a> 
<a class="jxr_linenumber" name="412" href="#412">412</a>     <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> handleDownstream(<a href="../../../../../../org/jboss/netty/channel/ChannelHandlerContext.html">ChannelHandlerContext</a> ctx, <a href="../../../../../../org/jboss/netty/channel/ChannelEvent.html">ChannelEvent</a> evt)
<a class="jxr_linenumber" name="413" href="#413">413</a>             <strong class="jxr_keyword">throws</strong> Exception {
<a class="jxr_linenumber" name="414" href="#414">414</a>         <strong class="jxr_keyword">if</strong> (evt instanceof ChannelStateEvent) {
<a class="jxr_linenumber" name="415" href="#415">415</a>             <a href="../../../../../../org/jboss/netty/channel/ChannelStateEvent.html">ChannelStateEvent</a> e = (ChannelStateEvent) evt;
<a class="jxr_linenumber" name="416" href="#416">416</a>             <strong class="jxr_keyword">switch</strong> (e.getState()) {
<a class="jxr_linenumber" name="417" href="#417">417</a>             <strong class="jxr_keyword">case</strong> OPEN:
<a class="jxr_linenumber" name="418" href="#418">418</a>             <strong class="jxr_keyword">case</strong> CONNECTED:
<a class="jxr_linenumber" name="419" href="#419">419</a>             <strong class="jxr_keyword">case</strong> BOUND:
<a class="jxr_linenumber" name="420" href="#420">420</a> 
<a class="jxr_linenumber" name="421" href="#421">421</a>                 <em class="jxr_comment">/*</em>
<a class="jxr_linenumber" name="422" href="#422">422</a> <em class="jxr_comment">                 * SPDY connection requirements:</em>
<a class="jxr_linenumber" name="423" href="#423">423</a> <em class="jxr_comment">                 *</em>
<a class="jxr_linenumber" name="424" href="#424">424</a> <em class="jxr_comment">                 * When either endpoint closes the transport-level connection,</em>
<a class="jxr_linenumber" name="425" href="#425">425</a> <em class="jxr_comment">                 * it must first send a GOAWAY frame.</em>
<a class="jxr_linenumber" name="426" href="#426">426</a> <em class="jxr_comment">                 */</em>
<a class="jxr_linenumber" name="427" href="#427">427</a>                 <strong class="jxr_keyword">if</strong> (Boolean.FALSE.equals(e.getValue()) || e.getValue() == <strong class="jxr_keyword">null</strong>) {
<a class="jxr_linenumber" name="428" href="#428">428</a>                     sendGoAwayFrame(ctx, e);
<a class="jxr_linenumber" name="429" href="#429">429</a>                     <strong class="jxr_keyword">return</strong>;
<a class="jxr_linenumber" name="430" href="#430">430</a>                 }
<a class="jxr_linenumber" name="431" href="#431">431</a>             }
<a class="jxr_linenumber" name="432" href="#432">432</a>         }
<a class="jxr_linenumber" name="433" href="#433">433</a>         <strong class="jxr_keyword">if</strong> (!(evt instanceof MessageEvent)) {
<a class="jxr_linenumber" name="434" href="#434">434</a>             ctx.sendDownstream(evt);
<a class="jxr_linenumber" name="435" href="#435">435</a>             <strong class="jxr_keyword">return</strong>;
<a class="jxr_linenumber" name="436" href="#436">436</a>         }
<a class="jxr_linenumber" name="437" href="#437">437</a> 
<a class="jxr_linenumber" name="438" href="#438">438</a>         <a href="../../../../../../org/jboss/netty/channel/MessageEvent.html">MessageEvent</a> e = (MessageEvent) evt;
<a class="jxr_linenumber" name="439" href="#439">439</a>         Object msg = e.getMessage();
<a class="jxr_linenumber" name="440" href="#440">440</a> 
<a class="jxr_linenumber" name="441" href="#441">441</a>         <strong class="jxr_keyword">if</strong> (msg instanceof SpdyDataFrame) {
<a class="jxr_linenumber" name="442" href="#442">442</a> 
<a class="jxr_linenumber" name="443" href="#443">443</a>             <a href="../../../../../../org/jboss/netty/handler/codec/spdy/SpdyDataFrame.html">SpdyDataFrame</a> spdyDataFrame = (SpdyDataFrame) msg;
<a class="jxr_linenumber" name="444" href="#444">444</a>             <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> streamID = spdyDataFrame.getStreamId();
<a class="jxr_linenumber" name="445" href="#445">445</a> 
<a class="jxr_linenumber" name="446" href="#446">446</a>             <em class="jxr_comment">// Frames must not be sent on half-closed streams</em>
<a class="jxr_linenumber" name="447" href="#447">447</a>             <strong class="jxr_keyword">if</strong> (spdySession.isLocalSideClosed(streamID)) {
<a class="jxr_linenumber" name="448" href="#448">448</a>                 e.getFuture().setFailure(PROTOCOL_EXCEPTION);
<a class="jxr_linenumber" name="449" href="#449">449</a>                 <strong class="jxr_keyword">return</strong>;
<a class="jxr_linenumber" name="450" href="#450">450</a>             }
<a class="jxr_linenumber" name="451" href="#451">451</a> 
<a class="jxr_linenumber" name="452" href="#452">452</a>             <em class="jxr_comment">/*</em>
<a class="jxr_linenumber" name="453" href="#453">453</a> <em class="jxr_comment">             * SPDY Data frame flow control processing requirements:</em>
<a class="jxr_linenumber" name="454" href="#454">454</a> <em class="jxr_comment">             *</em>
<a class="jxr_linenumber" name="455" href="#455">455</a> <em class="jxr_comment">             * Sender must not send a data frame with data length greater</em>
<a class="jxr_linenumber" name="456" href="#456">456</a> <em class="jxr_comment">             * than the transfer window size.</em>
<a class="jxr_linenumber" name="457" href="#457">457</a> <em class="jxr_comment">             *</em>
<a class="jxr_linenumber" name="458" href="#458">458</a> <em class="jxr_comment">             * After sending each data frame, the sender decrements its</em>
<a class="jxr_linenumber" name="459" href="#459">459</a> <em class="jxr_comment">             * transfer window size by the amount of data transmitted.</em>
<a class="jxr_linenumber" name="460" href="#460">460</a> <em class="jxr_comment">             *</em>
<a class="jxr_linenumber" name="461" href="#461">461</a> <em class="jxr_comment">             * When the window size becomes less than or equal to 0, the</em>
<a class="jxr_linenumber" name="462" href="#462">462</a> <em class="jxr_comment">             * sender must pause transmitting data frames.</em>
<a class="jxr_linenumber" name="463" href="#463">463</a> <em class="jxr_comment">             */</em>
<a class="jxr_linenumber" name="464" href="#464">464</a> 
<a class="jxr_linenumber" name="465" href="#465">465</a>             <strong class="jxr_keyword">if</strong> (flowControl) {
<a class="jxr_linenumber" name="466" href="#466">466</a>                 <strong class="jxr_keyword">synchronized</strong> (flowControlLock) {
<a class="jxr_linenumber" name="467" href="#467">467</a>                     <strong class="jxr_keyword">int</strong> dataLength = spdyDataFrame.getData().readableBytes();
<a class="jxr_linenumber" name="468" href="#468">468</a>                     <strong class="jxr_keyword">int</strong> sendWindowSize = spdySession.getSendWindowSize(streamID);
<a class="jxr_linenumber" name="469" href="#469">469</a> 
<a class="jxr_linenumber" name="470" href="#470">470</a>                     <strong class="jxr_keyword">if</strong> (sendWindowSize &gt;= dataLength) {
<a class="jxr_linenumber" name="471" href="#471">471</a>                         <em class="jxr_comment">// Window size is large enough to send entire data frame</em>
<a class="jxr_linenumber" name="472" href="#472">472</a>                         spdySession.updateSendWindowSize(streamID, -1 * dataLength);
<a class="jxr_linenumber" name="473" href="#473">473</a> 
<a class="jxr_linenumber" name="474" href="#474">474</a>                         <em class="jxr_comment">// The transfer window size is pre-decremented when sending a data frame downstream.</em>
<a class="jxr_linenumber" name="475" href="#475">475</a>                         <em class="jxr_comment">// Close the stream on write failures that leaves the transfer window in a corrupt state.</em>
<a class="jxr_linenumber" name="476" href="#476">476</a>                         <strong class="jxr_keyword">final</strong> SocketAddress remoteAddress = e.getRemoteAddress();
<a class="jxr_linenumber" name="477" href="#477">477</a>                         <strong class="jxr_keyword">final</strong> <a href="../../../../../../org/jboss/netty/channel/ChannelHandlerContext.html">ChannelHandlerContext</a> context = ctx;
<a class="jxr_linenumber" name="478" href="#478">478</a>                         e.getFuture().addListener(<strong class="jxr_keyword">new</strong> ChannelFutureListener() {
<a class="jxr_linenumber" name="479" href="#479">479</a>                             <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> operationComplete(<a href="../../../../../../org/jboss/netty/channel/ChannelFuture.html">ChannelFuture</a> future) <strong class="jxr_keyword">throws</strong> Exception {
<a class="jxr_linenumber" name="480" href="#480">480</a>                                 <strong class="jxr_keyword">if</strong> (!future.isSuccess()) {
<a class="jxr_linenumber" name="481" href="#481">481</a>                                     issueStreamError(
<a class="jxr_linenumber" name="482" href="#482">482</a>                                             context, remoteAddress, streamID, SpdyStreamStatus.INTERNAL_ERROR);
<a class="jxr_linenumber" name="483" href="#483">483</a>                                 }
<a class="jxr_linenumber" name="484" href="#484">484</a>                             }
<a class="jxr_linenumber" name="485" href="#485">485</a>                         });
<a class="jxr_linenumber" name="486" href="#486">486</a> 
<a class="jxr_linenumber" name="487" href="#487">487</a>                     } <strong class="jxr_keyword">else</strong> <strong class="jxr_keyword">if</strong> (sendWindowSize &gt; 0) {
<a class="jxr_linenumber" name="488" href="#488">488</a>                         <em class="jxr_comment">// Stream is not stalled but we cannot send the entire frame</em>
<a class="jxr_linenumber" name="489" href="#489">489</a>                         spdySession.updateSendWindowSize(streamID, -1 * sendWindowSize);
<a class="jxr_linenumber" name="490" href="#490">490</a> 
<a class="jxr_linenumber" name="491" href="#491">491</a>                         <em class="jxr_comment">// Create a partial data frame whose length is the current window size</em>
<a class="jxr_linenumber" name="492" href="#492">492</a>                         <a href="../../../../../../org/jboss/netty/handler/codec/spdy/SpdyDataFrame.html">SpdyDataFrame</a> partialDataFrame = <strong class="jxr_keyword">new</strong> <a href="../../../../../../org/jboss/netty/handler/codec/spdy/DefaultSpdyDataFrame.html">DefaultSpdyDataFrame</a>(streamID);
<a class="jxr_linenumber" name="493" href="#493">493</a>                         partialDataFrame.setData(spdyDataFrame.getData().readSlice(sendWindowSize));
<a class="jxr_linenumber" name="494" href="#494">494</a> 
<a class="jxr_linenumber" name="495" href="#495">495</a>                         <em class="jxr_comment">// Enqueue the remaining data (will be the first frame queued)</em>
<a class="jxr_linenumber" name="496" href="#496">496</a>                         spdySession.putPendingWrite(streamID, e);
<a class="jxr_linenumber" name="497" href="#497">497</a> 
<a class="jxr_linenumber" name="498" href="#498">498</a>                         <a href="../../../../../../org/jboss/netty/channel/ChannelFuture.html">ChannelFuture</a> writeFuture = Channels.future(e.getChannel());
<a class="jxr_linenumber" name="499" href="#499">499</a> 
<a class="jxr_linenumber" name="500" href="#500">500</a>                         <em class="jxr_comment">// The transfer window size is pre-decremented when sending a data frame downstream.</em>
<a class="jxr_linenumber" name="501" href="#501">501</a>                         <em class="jxr_comment">// Close the stream on write failures that leaves the transfer window in a corrupt state.</em>
<a class="jxr_linenumber" name="502" href="#502">502</a>                         <strong class="jxr_keyword">final</strong> SocketAddress remoteAddress = e.getRemoteAddress();
<a class="jxr_linenumber" name="503" href="#503">503</a>                         <strong class="jxr_keyword">final</strong> <a href="../../../../../../org/jboss/netty/channel/ChannelHandlerContext.html">ChannelHandlerContext</a> context = ctx;
<a class="jxr_linenumber" name="504" href="#504">504</a>                         e.getFuture().addListener(<strong class="jxr_keyword">new</strong> ChannelFutureListener() {
<a class="jxr_linenumber" name="505" href="#505">505</a>                             <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> operationComplete(<a href="../../../../../../org/jboss/netty/channel/ChannelFuture.html">ChannelFuture</a> future) <strong class="jxr_keyword">throws</strong> Exception {
<a class="jxr_linenumber" name="506" href="#506">506</a>                                 <strong class="jxr_keyword">if</strong> (!future.isSuccess()) {
<a class="jxr_linenumber" name="507" href="#507">507</a>                                     issueStreamError(
<a class="jxr_linenumber" name="508" href="#508">508</a>                                             context, remoteAddress, streamID, SpdyStreamStatus.INTERNAL_ERROR);
<a class="jxr_linenumber" name="509" href="#509">509</a>                                 }
<a class="jxr_linenumber" name="510" href="#510">510</a>                             }
<a class="jxr_linenumber" name="511" href="#511">511</a>                         });
<a class="jxr_linenumber" name="512" href="#512">512</a> 
<a class="jxr_linenumber" name="513" href="#513">513</a>                         Channels.write(ctx, writeFuture, partialDataFrame, remoteAddress);
<a class="jxr_linenumber" name="514" href="#514">514</a>                         <strong class="jxr_keyword">return</strong>;
<a class="jxr_linenumber" name="515" href="#515">515</a>                     } <strong class="jxr_keyword">else</strong> {
<a class="jxr_linenumber" name="516" href="#516">516</a>                         <em class="jxr_comment">// Stream is stalled -- enqueue Data frame and return</em>
<a class="jxr_linenumber" name="517" href="#517">517</a>                         spdySession.putPendingWrite(streamID, e);
<a class="jxr_linenumber" name="518" href="#518">518</a>                         <strong class="jxr_keyword">return</strong>;
<a class="jxr_linenumber" name="519" href="#519">519</a>                     }
<a class="jxr_linenumber" name="520" href="#520">520</a>                 }
<a class="jxr_linenumber" name="521" href="#521">521</a>             }
<a class="jxr_linenumber" name="522" href="#522">522</a> 
<a class="jxr_linenumber" name="523" href="#523">523</a>             <em class="jxr_comment">// Close the local side of the stream if this is the last frame</em>
<a class="jxr_linenumber" name="524" href="#524">524</a>             <strong class="jxr_keyword">if</strong> (spdyDataFrame.isLast()) {
<a class="jxr_linenumber" name="525" href="#525">525</a>                 halfCloseStream(streamID, false);
<a class="jxr_linenumber" name="526" href="#526">526</a>             }
<a class="jxr_linenumber" name="527" href="#527">527</a> 
<a class="jxr_linenumber" name="528" href="#528">528</a>         } <strong class="jxr_keyword">else</strong> <strong class="jxr_keyword">if</strong> (msg instanceof SpdySynStreamFrame) {
<a class="jxr_linenumber" name="529" href="#529">529</a> 
<a class="jxr_linenumber" name="530" href="#530">530</a>             <a href="../../../../../../org/jboss/netty/handler/codec/spdy/SpdySynStreamFrame.html">SpdySynStreamFrame</a> spdySynStreamFrame = (SpdySynStreamFrame) msg;
<a class="jxr_linenumber" name="531" href="#531">531</a>             <strong class="jxr_keyword">int</strong> streamID = spdySynStreamFrame.getStreamId();
<a class="jxr_linenumber" name="532" href="#532">532</a> 
<a class="jxr_linenumber" name="533" href="#533">533</a>             <strong class="jxr_keyword">if</strong> (isRemoteInitiatedID(streamID)) {
<a class="jxr_linenumber" name="534" href="#534">534</a>                 e.getFuture().setFailure(PROTOCOL_EXCEPTION);
<a class="jxr_linenumber" name="535" href="#535">535</a>                 <strong class="jxr_keyword">return</strong>;
<a class="jxr_linenumber" name="536" href="#536">536</a>             }
<a class="jxr_linenumber" name="537" href="#537">537</a> 
<a class="jxr_linenumber" name="538" href="#538">538</a>             byte priority = spdySynStreamFrame.getPriority();
<a class="jxr_linenumber" name="539" href="#539">539</a>             <strong class="jxr_keyword">boolean</strong> remoteSideClosed = spdySynStreamFrame.isUnidirectional();
<a class="jxr_linenumber" name="540" href="#540">540</a>             <strong class="jxr_keyword">boolean</strong> localSideClosed = spdySynStreamFrame.isLast();
<a class="jxr_linenumber" name="541" href="#541">541</a>             <strong class="jxr_keyword">if</strong> (!acceptStream(streamID, priority, remoteSideClosed, localSideClosed)) {
<a class="jxr_linenumber" name="542" href="#542">542</a>                 e.getFuture().setFailure(PROTOCOL_EXCEPTION);
<a class="jxr_linenumber" name="543" href="#543">543</a>                 <strong class="jxr_keyword">return</strong>;
<a class="jxr_linenumber" name="544" href="#544">544</a>             }
<a class="jxr_linenumber" name="545" href="#545">545</a> 
<a class="jxr_linenumber" name="546" href="#546">546</a>         } <strong class="jxr_keyword">else</strong> <strong class="jxr_keyword">if</strong> (msg instanceof SpdySynReplyFrame) {
<a class="jxr_linenumber" name="547" href="#547">547</a> 
<a class="jxr_linenumber" name="548" href="#548">548</a>             <a href="../../../../../../org/jboss/netty/handler/codec/spdy/SpdySynReplyFrame.html">SpdySynReplyFrame</a> spdySynReplyFrame = (SpdySynReplyFrame) msg;
<a class="jxr_linenumber" name="549" href="#549">549</a>             <strong class="jxr_keyword">int</strong> streamID = spdySynReplyFrame.getStreamId();
<a class="jxr_linenumber" name="550" href="#550">550</a> 
<a class="jxr_linenumber" name="551" href="#551">551</a>             <em class="jxr_comment">// Frames must not be sent on half-closed streams</em>
<a class="jxr_linenumber" name="552" href="#552">552</a>             <strong class="jxr_keyword">if</strong> (!isRemoteInitiatedID(streamID) || spdySession.isLocalSideClosed(streamID)) {
<a class="jxr_linenumber" name="553" href="#553">553</a>                 e.getFuture().setFailure(PROTOCOL_EXCEPTION);
<a class="jxr_linenumber" name="554" href="#554">554</a>                 <strong class="jxr_keyword">return</strong>;
<a class="jxr_linenumber" name="555" href="#555">555</a>             }
<a class="jxr_linenumber" name="556" href="#556">556</a> 
<a class="jxr_linenumber" name="557" href="#557">557</a>             <em class="jxr_comment">// Close the local side of the stream if this is the last frame</em>
<a class="jxr_linenumber" name="558" href="#558">558</a>             <strong class="jxr_keyword">if</strong> (spdySynReplyFrame.isLast()) {
<a class="jxr_linenumber" name="559" href="#559">559</a>                 halfCloseStream(streamID, false);
<a class="jxr_linenumber" name="560" href="#560">560</a>             }
<a class="jxr_linenumber" name="561" href="#561">561</a> 
<a class="jxr_linenumber" name="562" href="#562">562</a>         } <strong class="jxr_keyword">else</strong> <strong class="jxr_keyword">if</strong> (msg instanceof SpdyRstStreamFrame) {
<a class="jxr_linenumber" name="563" href="#563">563</a> 
<a class="jxr_linenumber" name="564" href="#564">564</a>             <a href="../../../../../../org/jboss/netty/handler/codec/spdy/SpdyRstStreamFrame.html">SpdyRstStreamFrame</a> spdyRstStreamFrame = (SpdyRstStreamFrame) msg;
<a class="jxr_linenumber" name="565" href="#565">565</a>             removeStream(spdyRstStreamFrame.getStreamId());
<a class="jxr_linenumber" name="566" href="#566">566</a> 
<a class="jxr_linenumber" name="567" href="#567">567</a>         } <strong class="jxr_keyword">else</strong> <strong class="jxr_keyword">if</strong> (msg instanceof SpdySettingsFrame) {
<a class="jxr_linenumber" name="568" href="#568">568</a> 
<a class="jxr_linenumber" name="569" href="#569">569</a>             <a href="../../../../../../org/jboss/netty/handler/codec/spdy/SpdySettingsFrame.html">SpdySettingsFrame</a> spdySettingsFrame = (SpdySettingsFrame) msg;
<a class="jxr_linenumber" name="570" href="#570">570</a> 
<a class="jxr_linenumber" name="571" href="#571">571</a>             <strong class="jxr_keyword">int</strong> newConcurrentStreams =
<a class="jxr_linenumber" name="572" href="#572">572</a>                     spdySettingsFrame.getValue(SpdySettingsFrame.SETTINGS_MAX_CONCURRENT_STREAMS);
<a class="jxr_linenumber" name="573" href="#573">573</a>             <strong class="jxr_keyword">if</strong> (newConcurrentStreams &gt;= 0) {
<a class="jxr_linenumber" name="574" href="#574">574</a>                 updateConcurrentStreams(newConcurrentStreams, false);
<a class="jxr_linenumber" name="575" href="#575">575</a>             }
<a class="jxr_linenumber" name="576" href="#576">576</a> 
<a class="jxr_linenumber" name="577" href="#577">577</a>             <em class="jxr_comment">// Persistence flag are inconsistent with the use of SETTINGS to communicate</em>
<a class="jxr_linenumber" name="578" href="#578">578</a>             <em class="jxr_comment">// the initial window size. Remove flags from the sender requesting that the</em>
<a class="jxr_linenumber" name="579" href="#579">579</a>             <em class="jxr_comment">// value be persisted. Remove values that the sender indicates are persisted.</em>
<a class="jxr_linenumber" name="580" href="#580">580</a>             <strong class="jxr_keyword">if</strong> (spdySettingsFrame.isPersisted(SpdySettingsFrame.SETTINGS_INITIAL_WINDOW_SIZE)) {
<a class="jxr_linenumber" name="581" href="#581">581</a>                 spdySettingsFrame.removeValue(SpdySettingsFrame.SETTINGS_INITIAL_WINDOW_SIZE);
<a class="jxr_linenumber" name="582" href="#582">582</a>             }
<a class="jxr_linenumber" name="583" href="#583">583</a>             spdySettingsFrame.setPersistValue(SpdySettingsFrame.SETTINGS_INITIAL_WINDOW_SIZE, false);
<a class="jxr_linenumber" name="584" href="#584">584</a> 
<a class="jxr_linenumber" name="585" href="#585">585</a>             <strong class="jxr_keyword">if</strong> (flowControl) {
<a class="jxr_linenumber" name="586" href="#586">586</a>                 <strong class="jxr_keyword">int</strong> newInitialWindowSize =
<a class="jxr_linenumber" name="587" href="#587">587</a>                         spdySettingsFrame.getValue(SpdySettingsFrame.SETTINGS_INITIAL_WINDOW_SIZE);
<a class="jxr_linenumber" name="588" href="#588">588</a>                 <strong class="jxr_keyword">if</strong> (newInitialWindowSize &gt;= 0) {
<a class="jxr_linenumber" name="589" href="#589">589</a>                     updateInitialReceiveWindowSize(newInitialWindowSize);
<a class="jxr_linenumber" name="590" href="#590">590</a>                 }
<a class="jxr_linenumber" name="591" href="#591">591</a>             }
<a class="jxr_linenumber" name="592" href="#592">592</a> 
<a class="jxr_linenumber" name="593" href="#593">593</a>         } <strong class="jxr_keyword">else</strong> <strong class="jxr_keyword">if</strong> (msg instanceof SpdyPingFrame) {
<a class="jxr_linenumber" name="594" href="#594">594</a> 
<a class="jxr_linenumber" name="595" href="#595">595</a>             <a href="../../../../../../org/jboss/netty/handler/codec/spdy/SpdyPingFrame.html">SpdyPingFrame</a> spdyPingFrame = (SpdyPingFrame) msg;
<a class="jxr_linenumber" name="596" href="#596">596</a>             <strong class="jxr_keyword">if</strong> (isRemoteInitiatedID(spdyPingFrame.getId())) {
<a class="jxr_linenumber" name="597" href="#597">597</a>                 e.getFuture().setFailure(<strong class="jxr_keyword">new</strong> IllegalArgumentException(
<a class="jxr_linenumber" name="598" href="#598">598</a>                             <span class="jxr_string">"invalid PING ID: "</span> + spdyPingFrame.getId()));
<a class="jxr_linenumber" name="599" href="#599">599</a>                 <strong class="jxr_keyword">return</strong>;
<a class="jxr_linenumber" name="600" href="#600">600</a>             }
<a class="jxr_linenumber" name="601" href="#601">601</a>             pings.getAndIncrement();
<a class="jxr_linenumber" name="602" href="#602">602</a> 
<a class="jxr_linenumber" name="603" href="#603">603</a>         } <strong class="jxr_keyword">else</strong> <strong class="jxr_keyword">if</strong> (msg instanceof SpdyGoAwayFrame) {
<a class="jxr_linenumber" name="604" href="#604">604</a> 
<a class="jxr_linenumber" name="605" href="#605">605</a>             <em class="jxr_comment">// Why is this being sent? Intercept it and fail the write.</em>
<a class="jxr_linenumber" name="606" href="#606">606</a>             <em class="jxr_comment">// Should have sent a CLOSE ChannelStateEvent</em>
<a class="jxr_linenumber" name="607" href="#607">607</a>             e.getFuture().setFailure(PROTOCOL_EXCEPTION);
<a class="jxr_linenumber" name="608" href="#608">608</a>             <strong class="jxr_keyword">return</strong>;
<a class="jxr_linenumber" name="609" href="#609">609</a> 
<a class="jxr_linenumber" name="610" href="#610">610</a>         } <strong class="jxr_keyword">else</strong> <strong class="jxr_keyword">if</strong> (msg instanceof SpdyHeadersFrame) {
<a class="jxr_linenumber" name="611" href="#611">611</a> 
<a class="jxr_linenumber" name="612" href="#612">612</a>             <a href="../../../../../../org/jboss/netty/handler/codec/spdy/SpdyHeadersFrame.html">SpdyHeadersFrame</a> spdyHeadersFrame = (SpdyHeadersFrame) msg;
<a class="jxr_linenumber" name="613" href="#613">613</a>             <strong class="jxr_keyword">int</strong> streamID = spdyHeadersFrame.getStreamId();
<a class="jxr_linenumber" name="614" href="#614">614</a> 
<a class="jxr_linenumber" name="615" href="#615">615</a>             <em class="jxr_comment">// Frames must not be sent on half-closed streams</em>
<a class="jxr_linenumber" name="616" href="#616">616</a>             <strong class="jxr_keyword">if</strong> (spdySession.isLocalSideClosed(streamID)) {
<a class="jxr_linenumber" name="617" href="#617">617</a>                 e.getFuture().setFailure(PROTOCOL_EXCEPTION);
<a class="jxr_linenumber" name="618" href="#618">618</a>                 <strong class="jxr_keyword">return</strong>;
<a class="jxr_linenumber" name="619" href="#619">619</a>             }
<a class="jxr_linenumber" name="620" href="#620">620</a> 
<a class="jxr_linenumber" name="621" href="#621">621</a>             <em class="jxr_comment">// Close the local side of the stream if this is the last frame</em>
<a class="jxr_linenumber" name="622" href="#622">622</a>             <strong class="jxr_keyword">if</strong> (spdyHeadersFrame.isLast()) {
<a class="jxr_linenumber" name="623" href="#623">623</a>                 halfCloseStream(streamID, false);
<a class="jxr_linenumber" name="624" href="#624">624</a>             }
<a class="jxr_linenumber" name="625" href="#625">625</a> 
<a class="jxr_linenumber" name="626" href="#626">626</a>         } <strong class="jxr_keyword">else</strong> <strong class="jxr_keyword">if</strong> (msg instanceof SpdyWindowUpdateFrame) {
<a class="jxr_linenumber" name="627" href="#627">627</a> 
<a class="jxr_linenumber" name="628" href="#628">628</a>             <em class="jxr_comment">// Why is this being sent? Intercept it and fail the write.</em>
<a class="jxr_linenumber" name="629" href="#629">629</a>             e.getFuture().setFailure(PROTOCOL_EXCEPTION);
<a class="jxr_linenumber" name="630" href="#630">630</a>             <strong class="jxr_keyword">return</strong>;
<a class="jxr_linenumber" name="631" href="#631">631</a>         }
<a class="jxr_linenumber" name="632" href="#632">632</a> 
<a class="jxr_linenumber" name="633" href="#633">633</a>         ctx.sendDownstream(evt);
<a class="jxr_linenumber" name="634" href="#634">634</a>     }
<a class="jxr_linenumber" name="635" href="#635">635</a> 
<a class="jxr_linenumber" name="636" href="#636">636</a>     <em class="jxr_comment">/*</em>
<a class="jxr_linenumber" name="637" href="#637">637</a> <em class="jxr_comment">     * SPDY Session Error Handling:</em>
<a class="jxr_linenumber" name="638" href="#638">638</a> <em class="jxr_comment">     *</em>
<a class="jxr_linenumber" name="639" href="#639">639</a> <em class="jxr_comment">     * When a session error occurs, the endpoint encountering the error must first</em>
<a class="jxr_linenumber" name="640" href="#640">640</a> <em class="jxr_comment">     * send a GOAWAY frame with the Stream-ID of the most recently received stream</em>
<a class="jxr_linenumber" name="641" href="#641">641</a> <em class="jxr_comment">     * from the remote endpoint, and the error code for why the session is terminating.</em>
<a class="jxr_linenumber" name="642" href="#642">642</a> <em class="jxr_comment">     *</em>
<a class="jxr_linenumber" name="643" href="#643">643</a> <em class="jxr_comment">     * After sending the GOAWAY frame, the endpoint must close the TCP connection.</em>
<a class="jxr_linenumber" name="644" href="#644">644</a> <em class="jxr_comment">     */</em>
<a class="jxr_linenumber" name="645" href="#645">645</a>     <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">void</strong> issueSessionError(
<a class="jxr_linenumber" name="646" href="#646">646</a>             <a href="../../../../../../org/jboss/netty/channel/ChannelHandlerContext.html">ChannelHandlerContext</a> ctx, <a href="../../../../../../org/jboss/netty/channel/Channel.html">Channel</a> channel, SocketAddress remoteAddress, <a href="../../../../../../org/jboss/netty/handler/codec/spdy/SpdySessionStatus.html">SpdySessionStatus</a> status) {
<a class="jxr_linenumber" name="647" href="#647">647</a> 
<a class="jxr_linenumber" name="648" href="#648">648</a>         <a href="../../../../../../org/jboss/netty/channel/ChannelFuture.html">ChannelFuture</a> future = sendGoAwayFrame(ctx, channel, remoteAddress, status);
<a class="jxr_linenumber" name="649" href="#649">649</a>         future.addListener(ChannelFutureListener.CLOSE);
<a class="jxr_linenumber" name="650" href="#650">650</a>     }
<a class="jxr_linenumber" name="651" href="#651">651</a> 
<a class="jxr_linenumber" name="652" href="#652">652</a>     <em class="jxr_comment">/*</em>
<a class="jxr_linenumber" name="653" href="#653">653</a> <em class="jxr_comment">     * SPDY Stream Error Handling:</em>
<a class="jxr_linenumber" name="654" href="#654">654</a> <em class="jxr_comment">     *</em>
<a class="jxr_linenumber" name="655" href="#655">655</a> <em class="jxr_comment">     * Upon a stream error, the endpoint must send a RST_STREAM frame which contains</em>
<a class="jxr_linenumber" name="656" href="#656">656</a> <em class="jxr_comment">     * the Stream-ID for the stream where the error occurred and the error status which</em>
<a class="jxr_linenumber" name="657" href="#657">657</a> <em class="jxr_comment">     * caused the error.</em>
<a class="jxr_linenumber" name="658" href="#658">658</a> <em class="jxr_comment">     *</em>
<a class="jxr_linenumber" name="659" href="#659">659</a> <em class="jxr_comment">     * After sending the RST_STREAM, the stream is closed to the sending endpoint.</em>
<a class="jxr_linenumber" name="660" href="#660">660</a> <em class="jxr_comment">     *</em>
<a class="jxr_linenumber" name="661" href="#661">661</a> <em class="jxr_comment">     * Note: this is only called by the worker thread</em>
<a class="jxr_linenumber" name="662" href="#662">662</a> <em class="jxr_comment">     */</em>
<a class="jxr_linenumber" name="663" href="#663">663</a>     <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">void</strong> issueStreamError(
<a class="jxr_linenumber" name="664" href="#664">664</a>             <a href="../../../../../../org/jboss/netty/channel/ChannelHandlerContext.html">ChannelHandlerContext</a> ctx, SocketAddress remoteAddress, <strong class="jxr_keyword">int</strong> streamID, <a href="../../../../../../org/jboss/netty/handler/codec/spdy/SpdyStreamStatus.html">SpdyStreamStatus</a> status) {
<a class="jxr_linenumber" name="665" href="#665">665</a> 
<a class="jxr_linenumber" name="666" href="#666">666</a>         <strong class="jxr_keyword">boolean</strong> fireMessageReceived = !spdySession.isRemoteSideClosed(streamID);
<a class="jxr_linenumber" name="667" href="#667">667</a>         removeStream(streamID);
<a class="jxr_linenumber" name="668" href="#668">668</a> 
<a class="jxr_linenumber" name="669" href="#669">669</a>         <a href="../../../../../../org/jboss/netty/handler/codec/spdy/SpdyRstStreamFrame.html">SpdyRstStreamFrame</a> spdyRstStreamFrame = <strong class="jxr_keyword">new</strong> <a href="../../../../../../org/jboss/netty/handler/codec/spdy/DefaultSpdyRstStreamFrame.html">DefaultSpdyRstStreamFrame</a>(streamID, status);
<a class="jxr_linenumber" name="670" href="#670">670</a>         Channels.write(ctx, Channels.future(ctx.getChannel()), spdyRstStreamFrame, remoteAddress);
<a class="jxr_linenumber" name="671" href="#671">671</a>         <strong class="jxr_keyword">if</strong> (fireMessageReceived) {
<a class="jxr_linenumber" name="672" href="#672">672</a>             Channels.fireMessageReceived(ctx, spdyRstStreamFrame, remoteAddress);
<a class="jxr_linenumber" name="673" href="#673">673</a>         }
<a class="jxr_linenumber" name="674" href="#674">674</a>     }
<a class="jxr_linenumber" name="675" href="#675">675</a> 
<a class="jxr_linenumber" name="676" href="#676">676</a>     <em class="jxr_comment">/*</em>
<a class="jxr_linenumber" name="677" href="#677">677</a> <em class="jxr_comment">     * Helper functions</em>
<a class="jxr_linenumber" name="678" href="#678">678</a> <em class="jxr_comment">     */</em>
<a class="jxr_linenumber" name="679" href="#679">679</a> 
<a class="jxr_linenumber" name="680" href="#680">680</a>     <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">boolean</strong> isRemoteInitiatedID(<strong class="jxr_keyword">int</strong> id) {
<a class="jxr_linenumber" name="681" href="#681">681</a>         <strong class="jxr_keyword">boolean</strong> serverID = isServerId(id);
<a class="jxr_linenumber" name="682" href="#682">682</a>         <strong class="jxr_keyword">return</strong> server &amp;&amp; !serverID || !server &amp;&amp; serverID;
<a class="jxr_linenumber" name="683" href="#683">683</a>     }
<a class="jxr_linenumber" name="684" href="#684">684</a> 
<a class="jxr_linenumber" name="685" href="#685">685</a>     <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">void</strong> updateConcurrentStreams(<strong class="jxr_keyword">int</strong> newConcurrentStreams, <strong class="jxr_keyword">boolean</strong> remote) {
<a class="jxr_linenumber" name="686" href="#686">686</a>         <strong class="jxr_keyword">if</strong> (remote) {
<a class="jxr_linenumber" name="687" href="#687">687</a>             remoteConcurrentStreams = newConcurrentStreams;
<a class="jxr_linenumber" name="688" href="#688">688</a>         } <strong class="jxr_keyword">else</strong> {
<a class="jxr_linenumber" name="689" href="#689">689</a>             localConcurrentStreams = newConcurrentStreams;
<a class="jxr_linenumber" name="690" href="#690">690</a>         }
<a class="jxr_linenumber" name="691" href="#691">691</a>         <strong class="jxr_keyword">if</strong> (localConcurrentStreams == remoteConcurrentStreams) {
<a class="jxr_linenumber" name="692" href="#692">692</a>             maxConcurrentStreams = localConcurrentStreams;
<a class="jxr_linenumber" name="693" href="#693">693</a>             <strong class="jxr_keyword">return</strong>;
<a class="jxr_linenumber" name="694" href="#694">694</a>         }
<a class="jxr_linenumber" name="695" href="#695">695</a>         <strong class="jxr_keyword">if</strong> (localConcurrentStreams == 0) {
<a class="jxr_linenumber" name="696" href="#696">696</a>             maxConcurrentStreams = remoteConcurrentStreams;
<a class="jxr_linenumber" name="697" href="#697">697</a>             <strong class="jxr_keyword">return</strong>;
<a class="jxr_linenumber" name="698" href="#698">698</a>         }
<a class="jxr_linenumber" name="699" href="#699">699</a>         <strong class="jxr_keyword">if</strong> (remoteConcurrentStreams == 0) {
<a class="jxr_linenumber" name="700" href="#700">700</a>             maxConcurrentStreams = localConcurrentStreams;
<a class="jxr_linenumber" name="701" href="#701">701</a>             <strong class="jxr_keyword">return</strong>;
<a class="jxr_linenumber" name="702" href="#702">702</a>         }
<a class="jxr_linenumber" name="703" href="#703">703</a>         <strong class="jxr_keyword">if</strong> (localConcurrentStreams &gt; remoteConcurrentStreams) {
<a class="jxr_linenumber" name="704" href="#704">704</a>             maxConcurrentStreams = remoteConcurrentStreams;
<a class="jxr_linenumber" name="705" href="#705">705</a>         } <strong class="jxr_keyword">else</strong> {
<a class="jxr_linenumber" name="706" href="#706">706</a>             maxConcurrentStreams = localConcurrentStreams;
<a class="jxr_linenumber" name="707" href="#707">707</a>         }
<a class="jxr_linenumber" name="708" href="#708">708</a>     }
<a class="jxr_linenumber" name="709" href="#709">709</a> 
<a class="jxr_linenumber" name="710" href="#710">710</a>     <em class="jxr_comment">// need to synchronize to prevent new streams from being created while updating active streams</em>
<a class="jxr_linenumber" name="711" href="#711">711</a>     <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">synchronized</strong> <strong class="jxr_keyword">void</strong> updateInitialSendWindowSize(<strong class="jxr_keyword">int</strong> newInitialWindowSize) {
<a class="jxr_linenumber" name="712" href="#712">712</a>         <strong class="jxr_keyword">int</strong> deltaWindowSize = newInitialWindowSize - initialSendWindowSize;
<a class="jxr_linenumber" name="713" href="#713">713</a>         initialSendWindowSize = newInitialWindowSize;
<a class="jxr_linenumber" name="714" href="#714">714</a>         <strong class="jxr_keyword">for</strong> (Integer StreamID: spdySession.getActiveStreams()) {
<a class="jxr_linenumber" name="715" href="#715">715</a>             spdySession.updateSendWindowSize(StreamID.intValue(), deltaWindowSize);
<a class="jxr_linenumber" name="716" href="#716">716</a>         }
<a class="jxr_linenumber" name="717" href="#717">717</a>     }
<a class="jxr_linenumber" name="718" href="#718">718</a> 
<a class="jxr_linenumber" name="719" href="#719">719</a>     <em class="jxr_comment">// need to synchronize to prevent new streams from being created while updating active streams</em>
<a class="jxr_linenumber" name="720" href="#720">720</a>     <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">synchronized</strong> <strong class="jxr_keyword">void</strong> updateInitialReceiveWindowSize(<strong class="jxr_keyword">int</strong> newInitialWindowSize) {
<a class="jxr_linenumber" name="721" href="#721">721</a>         <strong class="jxr_keyword">int</strong> deltaWindowSize = newInitialWindowSize - initialReceiveWindowSize;
<a class="jxr_linenumber" name="722" href="#722">722</a>         initialReceiveWindowSize = newInitialWindowSize;
<a class="jxr_linenumber" name="723" href="#723">723</a>         spdySession.updateAllReceiveWindowSizes(deltaWindowSize);
<a class="jxr_linenumber" name="724" href="#724">724</a>     }
<a class="jxr_linenumber" name="725" href="#725">725</a> 
<a class="jxr_linenumber" name="726" href="#726">726</a>     <em class="jxr_comment">// need to synchronize accesses to sentGoAwayFrame, lastGoodStreamID, and initial window sizes</em>
<a class="jxr_linenumber" name="727" href="#727">727</a>     <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">synchronized</strong> <strong class="jxr_keyword">boolean</strong> acceptStream(
<a class="jxr_linenumber" name="728" href="#728">728</a>             <strong class="jxr_keyword">int</strong> streamID, byte priority, <strong class="jxr_keyword">boolean</strong> remoteSideClosed, <strong class="jxr_keyword">boolean</strong> localSideClosed) {
<a class="jxr_linenumber" name="729" href="#729">729</a>         <em class="jxr_comment">// Cannot initiate any new streams after receiving or sending GOAWAY</em>
<a class="jxr_linenumber" name="730" href="#730">730</a>         <strong class="jxr_keyword">if</strong> (receivedGoAwayFrame || sentGoAwayFrame) {
<a class="jxr_linenumber" name="731" href="#731">731</a>             <strong class="jxr_keyword">return</strong> false;
<a class="jxr_linenumber" name="732" href="#732">732</a>         }
<a class="jxr_linenumber" name="733" href="#733">733</a> 
<a class="jxr_linenumber" name="734" href="#734">734</a>         <strong class="jxr_keyword">int</strong> maxConcurrentStreams = <strong class="jxr_keyword">this</strong>.maxConcurrentStreams; <em class="jxr_comment">// read volatile once</em>
<a class="jxr_linenumber" name="735" href="#735">735</a>         <strong class="jxr_keyword">if</strong> (maxConcurrentStreams != 0 &amp;&amp;
<a class="jxr_linenumber" name="736" href="#736">736</a>            spdySession.numActiveStreams() &gt;= maxConcurrentStreams) {
<a class="jxr_linenumber" name="737" href="#737">737</a>             <strong class="jxr_keyword">return</strong> false;
<a class="jxr_linenumber" name="738" href="#738">738</a>         }
<a class="jxr_linenumber" name="739" href="#739">739</a>         spdySession.acceptStream(
<a class="jxr_linenumber" name="740" href="#740">740</a>                 streamID, priority, remoteSideClosed, localSideClosed,
<a class="jxr_linenumber" name="741" href="#741">741</a>                 initialSendWindowSize, initialReceiveWindowSize);
<a class="jxr_linenumber" name="742" href="#742">742</a>         <strong class="jxr_keyword">if</strong> (isRemoteInitiatedID(streamID)) {
<a class="jxr_linenumber" name="743" href="#743">743</a>             lastGoodStreamID = streamID;
<a class="jxr_linenumber" name="744" href="#744">744</a>         }
<a class="jxr_linenumber" name="745" href="#745">745</a>         <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">true</strong>;
<a class="jxr_linenumber" name="746" href="#746">746</a>     }
<a class="jxr_linenumber" name="747" href="#747">747</a> 
<a class="jxr_linenumber" name="748" href="#748">748</a>     <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">void</strong> halfCloseStream(<strong class="jxr_keyword">int</strong> streamID, <strong class="jxr_keyword">boolean</strong> remote) {
<a class="jxr_linenumber" name="749" href="#749">749</a>         <strong class="jxr_keyword">if</strong> (remote) {
<a class="jxr_linenumber" name="750" href="#750">750</a>             spdySession.closeRemoteSide(streamID);
<a class="jxr_linenumber" name="751" href="#751">751</a>         } <strong class="jxr_keyword">else</strong> {
<a class="jxr_linenumber" name="752" href="#752">752</a>             spdySession.closeLocalSide(streamID);
<a class="jxr_linenumber" name="753" href="#753">753</a>         }
<a class="jxr_linenumber" name="754" href="#754">754</a>         <strong class="jxr_keyword">if</strong> (closeSessionFuture != <strong class="jxr_keyword">null</strong> &amp;&amp; spdySession.noActiveStreams()) {
<a class="jxr_linenumber" name="755" href="#755">755</a>             closeSessionFuture.setSuccess();
<a class="jxr_linenumber" name="756" href="#756">756</a>         }
<a class="jxr_linenumber" name="757" href="#757">757</a>     }
<a class="jxr_linenumber" name="758" href="#758">758</a> 
<a class="jxr_linenumber" name="759" href="#759">759</a>     <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">void</strong> removeStream(<strong class="jxr_keyword">int</strong> streamID) {
<a class="jxr_linenumber" name="760" href="#760">760</a>         spdySession.removeStream(streamID);
<a class="jxr_linenumber" name="761" href="#761">761</a>         <strong class="jxr_keyword">if</strong> (closeSessionFuture != <strong class="jxr_keyword">null</strong> &amp;&amp; spdySession.noActiveStreams()) {
<a class="jxr_linenumber" name="762" href="#762">762</a>             closeSessionFuture.setSuccess();
<a class="jxr_linenumber" name="763" href="#763">763</a>         }
<a class="jxr_linenumber" name="764" href="#764">764</a>     }
<a class="jxr_linenumber" name="765" href="#765">765</a> 
<a class="jxr_linenumber" name="766" href="#766">766</a>     <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">void</strong> updateSendWindowSize(<a href="../../../../../../org/jboss/netty/channel/ChannelHandlerContext.html">ChannelHandlerContext</a> ctx, <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> streamID, <strong class="jxr_keyword">int</strong> deltaWindowSize) {
<a class="jxr_linenumber" name="767" href="#767">767</a>         <strong class="jxr_keyword">synchronized</strong> (flowControlLock) {
<a class="jxr_linenumber" name="768" href="#768">768</a>             <strong class="jxr_keyword">int</strong> newWindowSize = spdySession.updateSendWindowSize(streamID, deltaWindowSize);
<a class="jxr_linenumber" name="769" href="#769">769</a> 
<a class="jxr_linenumber" name="770" href="#770">770</a>             <strong class="jxr_keyword">while</strong> (newWindowSize &gt; 0) {
<a class="jxr_linenumber" name="771" href="#771">771</a>                 <em class="jxr_comment">// Check if we have unblocked a stalled stream</em>
<a class="jxr_linenumber" name="772" href="#772">772</a>                 <a href="../../../../../../org/jboss/netty/channel/MessageEvent.html">MessageEvent</a> e = spdySession.getPendingWrite(streamID);
<a class="jxr_linenumber" name="773" href="#773">773</a>                 <strong class="jxr_keyword">if</strong> (e == <strong class="jxr_keyword">null</strong>) {
<a class="jxr_linenumber" name="774" href="#774">774</a>                     <strong class="jxr_keyword">break</strong>;
<a class="jxr_linenumber" name="775" href="#775">775</a>                 }
<a class="jxr_linenumber" name="776" href="#776">776</a> 
<a class="jxr_linenumber" name="777" href="#777">777</a>                 <a href="../../../../../../org/jboss/netty/handler/codec/spdy/SpdyDataFrame.html">SpdyDataFrame</a> spdyDataFrame = (SpdyDataFrame) e.getMessage();
<a class="jxr_linenumber" name="778" href="#778">778</a>                 <strong class="jxr_keyword">int</strong> dataFrameSize = spdyDataFrame.getData().readableBytes();
<a class="jxr_linenumber" name="779" href="#779">779</a> 
<a class="jxr_linenumber" name="780" href="#780">780</a>                 <strong class="jxr_keyword">if</strong> (newWindowSize &gt;= dataFrameSize) {
<a class="jxr_linenumber" name="781" href="#781">781</a>                     <em class="jxr_comment">// Window size is large enough to send entire data frame</em>
<a class="jxr_linenumber" name="782" href="#782">782</a>                     spdySession.removePendingWrite(streamID);
<a class="jxr_linenumber" name="783" href="#783">783</a>                     newWindowSize = spdySession.updateSendWindowSize(streamID, -1 * dataFrameSize);
<a class="jxr_linenumber" name="784" href="#784">784</a> 
<a class="jxr_linenumber" name="785" href="#785">785</a>                     <em class="jxr_comment">// The transfer window size is pre-decremented when sending a data frame downstream.</em>
<a class="jxr_linenumber" name="786" href="#786">786</a>                     <em class="jxr_comment">// Close the stream on write failures that leaves the transfer window in a corrupt state.</em>
<a class="jxr_linenumber" name="787" href="#787">787</a>                     <strong class="jxr_keyword">final</strong> SocketAddress remoteAddress = e.getRemoteAddress();
<a class="jxr_linenumber" name="788" href="#788">788</a>                     <strong class="jxr_keyword">final</strong> <a href="../../../../../../org/jboss/netty/channel/ChannelHandlerContext.html">ChannelHandlerContext</a> context = ctx;
<a class="jxr_linenumber" name="789" href="#789">789</a>                     e.getFuture().addListener(<strong class="jxr_keyword">new</strong> ChannelFutureListener() {
<a class="jxr_linenumber" name="790" href="#790">790</a>                         <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> operationComplete(<a href="../../../../../../org/jboss/netty/channel/ChannelFuture.html">ChannelFuture</a> future) <strong class="jxr_keyword">throws</strong> Exception {
<a class="jxr_linenumber" name="791" href="#791">791</a>                             <strong class="jxr_keyword">if</strong> (!future.isSuccess()) {
<a class="jxr_linenumber" name="792" href="#792">792</a>                                 issueStreamError(context, remoteAddress, streamID, SpdyStreamStatus.INTERNAL_ERROR);
<a class="jxr_linenumber" name="793" href="#793">793</a>                             }
<a class="jxr_linenumber" name="794" href="#794">794</a>                         }
<a class="jxr_linenumber" name="795" href="#795">795</a>                     });
<a class="jxr_linenumber" name="796" href="#796">796</a> 
<a class="jxr_linenumber" name="797" href="#797">797</a>                     <em class="jxr_comment">// Close the local side of the stream if this is the last frame</em>
<a class="jxr_linenumber" name="798" href="#798">798</a>                     <strong class="jxr_keyword">if</strong> (spdyDataFrame.isLast()) {
<a class="jxr_linenumber" name="799" href="#799">799</a>                         halfCloseStream(streamID, false);
<a class="jxr_linenumber" name="800" href="#800">800</a>                     }
<a class="jxr_linenumber" name="801" href="#801">801</a> 
<a class="jxr_linenumber" name="802" href="#802">802</a>                     Channels.write(ctx, e.getFuture(), spdyDataFrame, e.getRemoteAddress());
<a class="jxr_linenumber" name="803" href="#803">803</a>                 } <strong class="jxr_keyword">else</strong> {
<a class="jxr_linenumber" name="804" href="#804">804</a>                     <em class="jxr_comment">// We can send a partial frame</em>
<a class="jxr_linenumber" name="805" href="#805">805</a>                     spdySession.updateSendWindowSize(streamID, -1 * newWindowSize);
<a class="jxr_linenumber" name="806" href="#806">806</a> 
<a class="jxr_linenumber" name="807" href="#807">807</a>                     <em class="jxr_comment">// Create a partial data frame whose length is the current window size</em>
<a class="jxr_linenumber" name="808" href="#808">808</a>                     <a href="../../../../../../org/jboss/netty/handler/codec/spdy/SpdyDataFrame.html">SpdyDataFrame</a> partialDataFrame = <strong class="jxr_keyword">new</strong> <a href="../../../../../../org/jboss/netty/handler/codec/spdy/DefaultSpdyDataFrame.html">DefaultSpdyDataFrame</a>(streamID);
<a class="jxr_linenumber" name="809" href="#809">809</a>                     partialDataFrame.setData(spdyDataFrame.getData().readSlice(newWindowSize));
<a class="jxr_linenumber" name="810" href="#810">810</a> 
<a class="jxr_linenumber" name="811" href="#811">811</a>                     <a href="../../../../../../org/jboss/netty/channel/ChannelFuture.html">ChannelFuture</a> writeFuture = Channels.future(e.getChannel());
<a class="jxr_linenumber" name="812" href="#812">812</a> 
<a class="jxr_linenumber" name="813" href="#813">813</a>                     <em class="jxr_comment">// The transfer window size is pre-decremented when sending a data frame downstream.</em>
<a class="jxr_linenumber" name="814" href="#814">814</a>                     <em class="jxr_comment">// Close the stream on write failures that leaves the transfer window in a corrupt state.</em>
<a class="jxr_linenumber" name="815" href="#815">815</a>                     <strong class="jxr_keyword">final</strong> SocketAddress remoteAddress = e.getRemoteAddress();
<a class="jxr_linenumber" name="816" href="#816">816</a>                     <strong class="jxr_keyword">final</strong> <a href="../../../../../../org/jboss/netty/channel/ChannelHandlerContext.html">ChannelHandlerContext</a> context = ctx;
<a class="jxr_linenumber" name="817" href="#817">817</a>                     e.getFuture().addListener(<strong class="jxr_keyword">new</strong> ChannelFutureListener() {
<a class="jxr_linenumber" name="818" href="#818">818</a>                         <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> operationComplete(<a href="../../../../../../org/jboss/netty/channel/ChannelFuture.html">ChannelFuture</a> future) <strong class="jxr_keyword">throws</strong> Exception {
<a class="jxr_linenumber" name="819" href="#819">819</a>                             <strong class="jxr_keyword">if</strong> (!future.isSuccess()) {
<a class="jxr_linenumber" name="820" href="#820">820</a>                                 issueStreamError(context, remoteAddress, streamID, SpdyStreamStatus.INTERNAL_ERROR);
<a class="jxr_linenumber" name="821" href="#821">821</a>                             }
<a class="jxr_linenumber" name="822" href="#822">822</a>                         }
<a class="jxr_linenumber" name="823" href="#823">823</a>                     });
<a class="jxr_linenumber" name="824" href="#824">824</a> 
<a class="jxr_linenumber" name="825" href="#825">825</a>                     Channels.write(ctx, writeFuture, partialDataFrame, remoteAddress);
<a class="jxr_linenumber" name="826" href="#826">826</a> 
<a class="jxr_linenumber" name="827" href="#827">827</a>                     newWindowSize = 0;
<a class="jxr_linenumber" name="828" href="#828">828</a>                 }
<a class="jxr_linenumber" name="829" href="#829">829</a>             }
<a class="jxr_linenumber" name="830" href="#830">830</a>         }
<a class="jxr_linenumber" name="831" href="#831">831</a>     }
<a class="jxr_linenumber" name="832" href="#832">832</a> 
<a class="jxr_linenumber" name="833" href="#833">833</a>     <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">void</strong> sendGoAwayFrame(<a href="../../../../../../org/jboss/netty/channel/ChannelHandlerContext.html">ChannelHandlerContext</a> ctx, <a href="../../../../../../org/jboss/netty/channel/ChannelStateEvent.html">ChannelStateEvent</a> e) {
<a class="jxr_linenumber" name="834" href="#834">834</a>         <em class="jxr_comment">// Avoid NotYetConnectedException</em>
<a class="jxr_linenumber" name="835" href="#835">835</a>         <strong class="jxr_keyword">if</strong> (!e.getChannel().isConnected()) {
<a class="jxr_linenumber" name="836" href="#836">836</a>             ctx.sendDownstream(e);
<a class="jxr_linenumber" name="837" href="#837">837</a>             <strong class="jxr_keyword">return</strong>;
<a class="jxr_linenumber" name="838" href="#838">838</a>         }
<a class="jxr_linenumber" name="839" href="#839">839</a> 
<a class="jxr_linenumber" name="840" href="#840">840</a>         <a href="../../../../../../org/jboss/netty/channel/ChannelFuture.html">ChannelFuture</a> future = sendGoAwayFrame(ctx, e.getChannel(), <strong class="jxr_keyword">null</strong>, SpdySessionStatus.OK);
<a class="jxr_linenumber" name="841" href="#841">841</a>         <strong class="jxr_keyword">if</strong> (spdySession.noActiveStreams()) {
<a class="jxr_linenumber" name="842" href="#842">842</a>             future.addListener(<strong class="jxr_keyword">new</strong> <a href="../../../../../../org/jboss/netty/handler/codec/spdy/SpdySessionHandler.html">ClosingChannelFutureListener</a>(ctx, e));
<a class="jxr_linenumber" name="843" href="#843">843</a>         } <strong class="jxr_keyword">else</strong> {
<a class="jxr_linenumber" name="844" href="#844">844</a>             closeSessionFuture = Channels.future(e.getChannel());
<a class="jxr_linenumber" name="845" href="#845">845</a>             closeSessionFuture.addListener(<strong class="jxr_keyword">new</strong> <a href="../../../../../../org/jboss/netty/handler/codec/spdy/SpdySessionHandler.html">ClosingChannelFutureListener</a>(ctx, e));
<a class="jxr_linenumber" name="846" href="#846">846</a>         }
<a class="jxr_linenumber" name="847" href="#847">847</a>     }
<a class="jxr_linenumber" name="848" href="#848">848</a> 
<a class="jxr_linenumber" name="849" href="#849">849</a>     <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">synchronized</strong> <a href="../../../../../../org/jboss/netty/channel/ChannelFuture.html">ChannelFuture</a> sendGoAwayFrame(
<a class="jxr_linenumber" name="850" href="#850">850</a>             <a href="../../../../../../org/jboss/netty/channel/ChannelHandlerContext.html">ChannelHandlerContext</a> ctx, <a href="../../../../../../org/jboss/netty/channel/Channel.html">Channel</a> channel, SocketAddress remoteAddress, <a href="../../../../../../org/jboss/netty/handler/codec/spdy/SpdySessionStatus.html">SpdySessionStatus</a> status) {
<a class="jxr_linenumber" name="851" href="#851">851</a>         <strong class="jxr_keyword">if</strong> (!sentGoAwayFrame) {
<a class="jxr_linenumber" name="852" href="#852">852</a>             sentGoAwayFrame = <strong class="jxr_keyword">true</strong>;
<a class="jxr_linenumber" name="853" href="#853">853</a>             <a href="../../../../../../org/jboss/netty/handler/codec/spdy/SpdyGoAwayFrame.html">SpdyGoAwayFrame</a> spdyGoAwayFrame = <strong class="jxr_keyword">new</strong> <a href="../../../../../../org/jboss/netty/handler/codec/spdy/DefaultSpdyGoAwayFrame.html">DefaultSpdyGoAwayFrame</a>(lastGoodStreamID, status);
<a class="jxr_linenumber" name="854" href="#854">854</a>             <a href="../../../../../../org/jboss/netty/channel/ChannelFuture.html">ChannelFuture</a> future = Channels.future(channel);
<a class="jxr_linenumber" name="855" href="#855">855</a>             Channels.write(ctx, future, spdyGoAwayFrame, remoteAddress);
<a class="jxr_linenumber" name="856" href="#856">856</a>             <strong class="jxr_keyword">return</strong> future;
<a class="jxr_linenumber" name="857" href="#857">857</a>         }
<a class="jxr_linenumber" name="858" href="#858">858</a>         <strong class="jxr_keyword">return</strong> Channels.succeededFuture(channel);
<a class="jxr_linenumber" name="859" href="#859">859</a>     }
<a class="jxr_linenumber" name="860" href="#860">860</a> 
<a class="jxr_linenumber" name="861" href="#861">861</a>     <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">class</strong> <a href="../../../../../../org/jboss/netty/handler/codec/spdy/SpdySessionHandler.html">ClosingChannelFutureListener</a> <strong class="jxr_keyword">implements</strong> <a href="../../../../../../org/jboss/netty/channel/ChannelFutureListener.html">ChannelFutureListener</a> {
<a class="jxr_linenumber" name="862" href="#862">862</a>         <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> <a href="../../../../../../org/jboss/netty/channel/ChannelHandlerContext.html">ChannelHandlerContext</a> ctx;
<a class="jxr_linenumber" name="863" href="#863">863</a>         <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> <a href="../../../../../../org/jboss/netty/channel/ChannelStateEvent.html">ChannelStateEvent</a> e;
<a class="jxr_linenumber" name="864" href="#864">864</a> 
<a class="jxr_linenumber" name="865" href="#865">865</a>         <a href="../../../../../../org/jboss/netty/handler/codec/spdy/SpdySessionHandler.html">ClosingChannelFutureListener</a>(<a href="../../../../../../org/jboss/netty/channel/ChannelHandlerContext.html">ChannelHandlerContext</a> ctx, <a href="../../../../../../org/jboss/netty/channel/ChannelStateEvent.html">ChannelStateEvent</a> e) {
<a class="jxr_linenumber" name="866" href="#866">866</a>             <strong class="jxr_keyword">this</strong>.ctx = ctx;
<a class="jxr_linenumber" name="867" href="#867">867</a>             <strong class="jxr_keyword">this</strong>.e = e;
<a class="jxr_linenumber" name="868" href="#868">868</a>         }
<a class="jxr_linenumber" name="869" href="#869">869</a> 
<a class="jxr_linenumber" name="870" href="#870">870</a>         <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> operationComplete(<a href="../../../../../../org/jboss/netty/channel/ChannelFuture.html">ChannelFuture</a> sentGoAwayFuture) <strong class="jxr_keyword">throws</strong> Exception {
<a class="jxr_linenumber" name="871" href="#871">871</a>             <strong class="jxr_keyword">if</strong> (!(sentGoAwayFuture.getCause() instanceof ClosedChannelException)) {
<a class="jxr_linenumber" name="872" href="#872">872</a>                 Channels.close(ctx, e.getFuture());
<a class="jxr_linenumber" name="873" href="#873">873</a>             } <strong class="jxr_keyword">else</strong> {
<a class="jxr_linenumber" name="874" href="#874">874</a>                 e.getFuture().setSuccess();
<a class="jxr_linenumber" name="875" href="#875">875</a>             }
<a class="jxr_linenumber" name="876" href="#876">876</a>         }
<a class="jxr_linenumber" name="877" href="#877">877</a>     }
<a class="jxr_linenumber" name="878" href="#878">878</a> }
</pre>
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